| Patent Number |
Title Of Patent |
Date Issued |
| D247440 |
Spectacle front |
March 7, 1978 |
|
| D246789 |
Pair of spectacles |
December 27, 1977 |
|
| 4073843 |
Process of partially expanding thermoplastic particles using a mixture of steam and a hot dry ga |
February 14, 1978 |
| Thermoplastic material in particulate form and containing a blowing agent is partially expanded by means of a mixture of steam and another hot dry gas such as air present in specified proportions in said mixture. |
| 4068616 |
Apparatus for treating plastic film |
January 17, 1978 |
| A running length of plastic film is processed by submerging a bight of the film in a bath of treatment liquid and drawing the film longitudinally therethrough by a pair of pinch rolls mounted closely adjacent and parallel to the top surface of the treatment liquid. The pinch rolls me |
| 4064116 |
ABS polymer and process for its preparation |
December 20, 1977 |
| ABS polymers having improved physical properties are prepared by graft polymerizing, in an aqueous medium, and in the presence of a suspending agent, styrene and acryonitrile onto a butadiene polymer in the form of a latex using certain peroxy ester catalysts. |
| 4060354 |
Apparatus for pre-expanding and molding expandable thermoplastic polymer particles |
November 29, 1977 |
| An energy saving and material conserving apparatus is provided for expanding and molding expandable thermoplastic polymer particles. Especially significant is the ability to produce molded objects of generally uniform density in the higher density range in the order of 4 - 15 pounds |
| 4046839 |
Compositions having high impact at low rubber levels |
September 6, 1977 |
| ABS polymers having improved physical properties are prepared by graft polymerizing, in an aqueous medium and in the presence of an effective amount of suspending agent and polymerization catalyst, styrene and acrylonitrile onto a butadiene polymer in the form of a latex, said butadi |
| 4032609 |
Method for pre-expanding and molding expandable thermoplastic polymer particles |
June 28, 1977 |
| An energy saving and material conserving method and apparatus are provided for expanding and molding expandable thermoplastic polymer particles. Especially significant is the ability to produce molded objects of generally uniform density in the higher density range in the order of 4-15 |
| 4024119 |
Polysulfone resins containing bibenzyl sulfone repeating units |
May 17, 1977 |
| Sulfone polymers are disclosed containing bibenzyl sulfone repeating units having the formula ##STR1## These polymers exhibit good mechanical properties, toughness, flexiblity, thermal and chemical stability and can be heat processed, extruded, drawn or otherwise formed into shap |
| 4024092 |
Polymer compositions containing stilbene halide additives |
May 17, 1977 |
| Polymer compositions having enhanced oxygen index values as measured by ASTM Method D-2863-70 are disclosed, which compositions contain effective amounts of a bromo or chloro derivative of stilbene. |
| 4018731 |
High impact polyamides |
April 19, 1977 |
| A high impact polyamide resin is prepared by interpolymerizing with polyamide forming monomers a minor amount of an approximately equi-molar mixture of a low molecular weight diolefin polymer, and a dimerized fat acid or acid derivative, said diolefin polymer and dimerized fat acid or |
| 4017245 |
Apparatus for extruding expandable thermoplastic material |
April 12, 1977 |
| Method and apparatus for extruding expandable thermoplastic material having a cellular internal body portion and formed thereon a substantially non-cellular high density skin. The extruded material is contacted by a pair of continuously traveling temperature controlled belts immediately |
| 4008605 |
Impact test method |
February 22, 1977 |
| A quick and reproducible method is disclosed for evaluating the impact properties of relatively stiff materials such as plastic. A test specimen in the form of a thin unnotched strand of known thickness is mounted in a holding means and subjected to impact by a pendulum type striking mea |
| 4000810 |
Case for clip-on sunglasses |
January 4, 1977 |
| A protective case for clip-on sunglasses (clip-ons) including a rigid plastic pouched shaped body having means thereon for preventing damage to the lenses or clip structure of the clip-ons and for maintaining the clip-ons properly positioned in the case to prevent inadvertent slippage |
| 3996311 |
Graft polybutadiene-styrene interpolymers and process for making same |
December 7, 1976 |
| Graft interpolymers are provided which comprise the polymerization product of a polybutadiene having a cis butadiene content of at least 25 percent and a 1,2-addition butadiene content of not more than about ten percent and of a vinyl aromatic monomer. Processes for their production are |
| 3993611 |
Zinc chloride resistant nylon |
November 23, 1976 |
| New polymeric compositions having a resistance to zinc chloride are prepared by copolymerizing polyamide-producing monomers containing up to 9 carbon atoms in each molecule of monomer with a long chain hydrocarbon diacid and a long chain hydrocarbon diamine. |
| 3992141 |
Method of and apparatus for treating plastic film |
November 16, 1976 |
| A running length of plastic film is processed by submerging a bight of the film in a bath of treatment liquid and drawing the film longitudinally therethrough by a pair of pinch rolls mounted closely adjacent and parallel to the top surface of the treatment liquid. The pinch rolls me |
| 3975474 |
Viewer |
August 17, 1976 |
| A 3-D viewer and the method and apparatus for the fabrication thereof, said viewer including a pair of plastic polarized lenses each ultrasonically cut out from a sheet of polarized material simultaneously ultrasonically sealed about a lens opening in a lens receiving frame. |
| 3966839 |
Homogeneous blends of polyamides with vinyl aromatic resins |
June 29, 1976 |
| Compositions based on blends of polyamide and vinyl aromatic resins having improved resistance to fibrillation may be prepared by the addition of a minor amount of a copolymer comprising a vinyl aromatic monomer and maleic anhydride followed by thorough mixing of the blend components at |
| 3963816 |
Process for molding expandable thermoplastic material |
June 15, 1976 |
| Molded articles are made from expandable thermoplastic resin material by pre-expanding the thermoplastic material in particulate or bead form containing as the principal expanding agent a liquid hydrocarbon by contact with steam until the desired degree of expansion is obtained, heat |
