| Patent Number |
Title Of Patent |
Date Issued |
| 4513549 |
Pre-mitered doorframe assembly for partition wall construction |
April 30, 1985 |
| A doorframe assembly for partition wall construction comprising metal backer jamb members adapted for attachment to opposite sides of a door opening, jamb members snap-engaged with the metal backer jamb members, hinge plate means for supporting a door attached along a longitudinal re |
| 4504602 |
Sprayable acoustical composition |
March 12, 1985 |
| A composition comprising mineral wool and polyolefin fibers is adaptable for spraying onto a ceiling or wall or the like to form a textured acoustical coating. |
| 4504335 |
Method for making reinforced cement board |
March 12, 1985 |
| A cement board of homogeneous composition from face to face and having a substantially uniform thickness is made continuously by distributing a sole cementitious composition on a moving carrier sheet and smoothing the surface by rotating a cylindrical roller in a direction counter to the |
| 4497150 |
Drive-in trim system for intersecting hollow wall partitions |
February 5, 1985 |
| A two piece system for driving a piece of trim into place at the intersection of paneled hollow wall partitions comprises a retainer clip and the trim piece. The retainer clip, made of spring steel, has a first leg which is secured to the partition and a detent leg which slips between |
| 4496515 |
Method for cutting gypsum board with high velocity fluid cutting jet |
January 29, 1985 |
| Gypsum board is formed into a continuous sheet by depositing an aqueous slurry of calcium sulfate hemihydrate, including conventional additives, between two paper cover sheets on a moving conveyor. After the slurry has reached the initial stiffening degree of set and before the slurry ha |
| 4488917 |
Method for making cement board |
December 18, 1984 |
| Mortar is deflected continuously onto a moving carrier sheet from a distributor belt which is moving transversely to the carrier sheet by a plow which shuttles across the length of the distributor belt. An uninterrupted flow of mortar is spread across the sheet. The layer of mortar o |
| 4488909 |
Non-expansive, rapid setting cement |
December 18, 1984 |
| An ettringite-producing hydraulic cement especially adapted to the high speed production of carbon dioxide resistant cement board produces essentially all of its potential ettringite within about 20 minutes after it is mixed with water. The cement is non-expansive and sets within about |
| 4487291 |
Sound attenuating partition |
December 11, 1984 |
| The sound attenuation of building partitions having a cavity between opposing panels thereof is enhanced by a bowed blanket of mineral fibers in said cavity. The apex of the bow is in compressive contact with one of the panels so that sound waves passing into a panel are dampened before |
| 4474720 |
Method of making pattern matrix having uniform backer thickness |
October 2, 1984 |
| A tough, flexible, sheet-like matrix for a bas-relief pattern is made by casting a reinforced resin on a mold of the pattern and submerging a perforated plate in the liquid resin so that the plate is parallel to a substantially flat plane generated by the lowest points of the pattern. |
| 4470877 |
Paper having calcium sulfate mineral filler for use in the production of gypsum wallboard |
September 11, 1984 |
| A composite paper particularly adapted for use as cover sheets in the production of gypsum wallboard, the paper being sufficiently porous to permit better drainage and more rapid drying in the production of the paper, and when applied to the surfaces of a gypsum slurry for forming wa |
| 4469656 |
Method for forming embossed acoustical tile |
September 4, 1984 |
| A method for making acoustical tile having a pattern of raised portions and portions in relief on the tile surface is provided by contacting deformable, acoustical tile fiber composition pulp with a hollow embossing roll containing the pattern in reverse and interstices communicating fro |
| 4464074 |
Connector and web stiffener |
August 7, 1984 |
| A connector for the interconnection in generally perpendicular array of generally C-shaped elongate structural members having a pair of flanges integrally and perpendicularly connected with the web portion thereof in which said flanges each include a flange return edge which extends |
| 4463535 |
Glass stop assembly |
August 7, 1984 |
| A demountable glass stop assembly for use in non-bearing partition wall glazing systems, comprising in combination a pair of elongate members preferably formed by extrusion, each of the elongate members being substantially U-shaped in cross-section, a first elongate member having a l |
| 4463039 |
Sprayable acoustical composition |
July 31, 1984 |
| A composition comprising mineral wool and polyolefin fibers is adaptable for spraying onto a ceiling or wall or the like to form a textured acoustical coating.The fibers are mixed with a binder, water and foaming agent to form a foamy composition. The composition is confined under pressu |
| 4457781 |
Method for solidifying waste slime suspensions |
July 3, 1984 |
| Solidification of colloidal argillaceous matter in essentially non-settling, aqueous slime media into a solid stable matrix is accomplished by mixing such slime with a hydratable calcium sulfate and hydrating to form an interlocking strength bearing matrix. The method is particularly |
| 4454267 |
Lightweight joint compound |
June 12, 1984 |
| A lightweight joint compound for use in finishing joints between gypsum wallboards, comprising a filler, a binder, a specially treated expanded perlite, a non-leveling agent, and a thickener. |
| 4453346 |
Adjustable wall jamb for shower door |
June 12, 1984 |
| An adjustable wall jamb assembly for a shower door comprising a fixed wall jamb member adapted to be affixed to a wall, an adjustable block assembly comprising a block adapted to be affixed to the fixed wall jamb and having a threaded opening, and an adjustment screw having an external t |
| 4452770 |
Phosphoanhydrite process |
June 5, 1984 |
| A wet process for producing phosphoric acid and phosphoanhydrite by acidulation of phosphate rock with a phosphoric acid/sulfuric acid mixture containing a very high recycle content of small sized anhydrite seed crystals. A strong phosphoric acid is obtained having a concentration of |
| 4450022 |
Method and apparatus for making reinforced cement board |
May 22, 1984 |
| A network of reinforcing fibers is pressed against the surface of an underlying carrier sheet by the weight of a concrete mix. A vertical gap between the sheet and the network is created so that the concrete mix may penetrate the voids of the network and spread out on the underlying shee |
| 4449338 |
Temporary restraining clamp for wallboard |
May 22, 1984 |
| An integral clamp and screw in the shape of an L has a panel supporting leg and a leg from which a screw projects through and beyond the panel supporting leg. The clamp is used to support a building panel while aligning said panel over the framing members to which it is to be attached |
| 4448639 |
Mineral fiber-containing paper for the production of gypsum wallboard product prepared therewith |
May 15, 1984 |
| A paper cover sheet material for use in the production of gypsum wallboard, the paper cover sheet material having excellent drainage, porosity and drying properties, and a wallboard product produced therefrom, the paper cover sheet material being produced from fibers comprising a major |
| 4435183 |
Process for rapid dewatering and drying of calcium sulfate hemihydrate |
March 6, 1984 |
| A process for rapidly dewatering and drying calcium sulfate hemihydrate in a centrifuging and flash drying operation by ejecting the wet solids from the centrifuge bowl directly into the flash dryer's high velocity, high volume, heated air stream. |
| 4430367 |
Translucent stainable coating |
February 7, 1984 |
| Substrates such as metal, plastic, hardboard and plywood may be coated with a translucent film of a filled acrylic resin so that a decorative stain may be applied. The filler in the acrylic resin is an extender pigment having a mean particle size of from about 5 to about 7 microns. |
| 4424197 |
Gas desulfurization |
January 3, 1984 |
| A process for adsorbing sulfur dioxide from a gas comprising contacting a gas containing SO.sub.2, such as a flue gas, with about stoichiometric amounts of a specially prepared calcium oxide so that substantially all of the sulfur dioxide content is reacted throughout the calcium oxide |
| 4424196 |
Phosphohemihydrate process for purification of gypsum |
January 3, 1984 |
| A wet process for producing phosphoric acid and phosphohemihydrate by acidulation of phosphate rock. A strong phosphoric acid is obtained with concomitant production of an improved calcium sulfate that is extremely low in radioactivity by operation in Region II for shorter time so as to |
| 4424148 |
Process for preparing wastes for non-pollutant disposal |
January 3, 1984 |
| A method of disposing of wastes, especially wastes containing radioactive or toxic substances, such as the wastes generated in the water associated with nuclear power production is described. A feature of the invention is to incorporate the waste into a hardenable setting mass when mixed |
| 4421731 |
Process for purifying phosphogypsum |
December 20, 1983 |
| A process for reducing radioactive contamination of phosphogypsum. Phosphogypsum containing radioactive material is calcined to form hemihydrate crystals carrying the radioactive contaminants, and a portion of the crystals is converted to substantially radiation-free gypsum crystals |
| 4421704 |
Method of treatment for plaster articles to improve wear and water resistance and article of man |
December 20, 1983 |
| A method of surface treatment for plaster articles to improve wear and water resistance is disclosed. The method includes the step of forming the article, allowing the article to set, drying to remove excess water, applying a coat of substantially molten Candelilla wax onto an exterior |
| 4419853 |
Method for treating the surface of a metal to improve the adhesion of a cementitious joint compo |
December 13, 1983 |
| A composition and method for treating the surface of a metal structure adapted to be used for such purposes as a cornerbead and to have a cementitious material such as a joint compound applied to the surface thereto, the compound and composition and method resulting in the improvemen |
| 4418101 |
Method of making thermoplastic hardboard from acetylated mat |
November 29, 1983 |
| A wet-felted mat of wood fibers is acetylated by coating the mat with a quantity of acetic anhydride ranging from 5 to 70% by volume of the mat and heating the mat at a temperature of from 150.degree. to 300.degree. F. while confining substantially all of the acetic anhydride within the |
| 4417883 |
Apparatus for creasing paper used in the production of gypsum wallboard |
November 29, 1983 |
| An apparatus for applying parallel spaced-apart creases on paper to be used as cover sheets in the manufacture of gypsum board, the parallel spaced-apart creases forming the corners of the wallboard and the distance between creases defining the thickness thereof, the apparatus being |
| 4411738 |
Press cycle reduction for wet pressed hardboard |
October 25, 1983 |
| The production of hardboard by the wet press process is speeded up by the incorporation of finely divided fibers in an aqueous slurry of otherwise fast draining wood fibers and a thermosetting binder so that a barrier of said fine fibers is formed during hot pressing of the mat and steam |
| 4409276 |
Metal article having three-dimensional wood grain and stainable coating |
October 11, 1983 |
| A metal article is made to look like wood by impressing a three-dimensional wood grain pattern in its surface, coating the pattern with a translucent film, and staining the film. The stainable film is an acrylic resin filled with an extender pigment whose mean particle size is from about |
| 4408428 |
Suspended panel ceiling having impact absorbent panel retaining clip assemblies |
October 11, 1983 |
| Panels resting in a suspended grid are rendered abuseresistant by mounting two-piece retaining clips atop the runners in the grid. The clip assemblies comprise a torsional/flexural spring mated with a clinch fastener. The spring is a piece of bent music wire having a central U-shaped |
| 4403006 |
Sag-resistant gypsum board containing coal fly ash and method for making same |
September 6, 1983 |
| A gypsum board consisting essentially of a monolithic cellular core of set gypsum and a fiberous cover sheet encasement provided with improved properties by the gypsum core having incorporated therein coal fly ash in an amount of about 1-20% by weight of stucco in the gypsum slurry used |
| 4402922 |
Process for rapid conversion of fluoroanhydrite to gypsum |
September 6, 1983 |
| A process for making an industrially usable gypsum from fluoroanhydrite in which fluoroanhydrite is contacted with a fluid reaction medium slurry containing soluble sulfate ions and a substantial proportion of small gypsum seed crystals to rapidly hydrate a large proportion of the fl |
| 4397623 |
Apparatus for the production of mineral fibers by means of rotating discs |
August 9, 1983 |
| An apparatus for producing mineral fibers comprising a container having means for heating the mineral material to form a molten pool therein, a plurality of discs having a portion thereof immersed in the molten pool, and means for rotating the discs in the same angular direction at high |
| 4388778 |
Enclosure for bathtub or shower having sliding doors |
June 21, 1983 |
| An enclosure for a bathtub or shower having a sliding door assembly and comprising a header or supporting assembly including a front header and a side header operatively connected thereto, each header having a pair of tracks, one for each door, the tracks of the front header communicatin |
| 4388378 |
Thermoplastic hardboard from acetylated mat |
June 14, 1983 |
| A wet-felted mat of wood fibers is acetylated by coating the mat with a quantity of acetic anhydride ranging from 5 to 70% by volume of the mat and heating the mat at a temperature of from 150.degree. to 300.degree. F. while confining substantially all of the acetic anhydride within the |
| 4388292 |
Process for reducing radioactive contamination in phosphogypsum |
June 14, 1983 |
| A process of two crystallization stages for reducing radioactive contamination of phosphogypsum is disclosed. In the process anhydrite crystals are obtained through dehydration of the radiation containing phosphogypsum in strong sulfuric acid; a portion of the anhydrite crystals cont |
| 4386180 |
Water-based stain |
May 31, 1983 |
| A water-based stain having a working time of from about 1 to about 3 minutes and a tack-free drying time of from about 10 to about 15 minutes at 160.degree. F. comprises an acrylic latex, a drying oil, ester gum, a glycol, a hydrocarbonaceous solvent, and pigment. |
| 4385476 |
Web stiffener for light-gauge metal framing members |
May 31, 1983 |
| A web stiffener for use with a channel-shaped framing member to inhibit web crippling is disclosed wherein said web stiffener comprises two opposing integral compression members each having a J-shaped cross-sectional configurational whereby said compression members are adapted for nested |
| 4382809 |
Method and apparatus for the production of mineral fiber felts having fiber-leveling device |
May 10, 1983 |
| An apparatus for the production of mineral fiber or wool felts, blankets or batts having uniform thickness and density, comprising means for fiberizing the mineral composition, a housing defining a chamber into which the fibers are introduced, a foraminous belt upon which the fibers |
| 4381578 |
Curtain rod having tension mounting mechanism |
May 3, 1983 |
| A flexible door or curtain support comprising an elongate member having a track for supporting the door or curtain, and apparatus for providing tension between the elongate member and a supporting wall comprising a pad or wall member for engaging the wall, a pressure plate engaging the e |
| 4377059 |
Concealed ceiling system with accessible ceiling panels |
March 22, 1983 |
| A suspended ceiling system comprising a plurality of inverted-T runners. Kerfed edge ceiling tile supported by runners and concealing the bottom of the runners. At least one ceiling tile having a central portion removable therefrom by being separable along a substantially vertical fine c |
| 4376674 |
Method of manufacturing flame and abuse resistant fiber panel and products resulting |
March 15, 1983 |
| A method of manufacturing flame and abuse resistant fiber panels by treating the surface of water-laid fiber mats with an aqeuous slurry of sodium silicate and calicum carbonate and drying the mats is disclosed. The slurry is applied to the wet mat after wet pressing and before drying |
| 4376361 |
Partition wall construction |
March 15, 1983 |
| An improvement in a partition wall construction having two spaced apart rows of wall board connected to flanged studs wherein studs are supportably engaged within opposingly spaced apart channels, a bottom channel opening upwardly with bottom portions of the studs residing therein an |
| 4375736 |
Shower door having adjustable pivot members |
March 8, 1983 |
| A pivotal door for an entrance or passageway, and particularly for shower or bathtub enclosures, comprising a plurality of frame members, a panel mounted in said frame members, a channel provided in both top and bottom frame members, and a pair of pivot members each having one end adjust |
| 4372814 |
Paper having mineral filler for use in the production of gypsum wallboard |
February 8, 1983 |
| A composite paper particularly adapted for use as cover sheets in the production of gypsum wallboard, the paper being sufficiently porous to permit better drainage and more rapid drying in the production of the paper, and when applied to the surfaces of a gypsum slurry for forming wa |
| 4367692 |
Joint compound dispenser |
January 11, 1983 |
| Wallboard joint tape is coated with joint compound as the tape is drawn through a container of the compound and made to pass through a tabbed slot in or associated with the container. The tabs urge the coated tape away from the edge of the slot which would otherwise wipe off the coating |
