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Class Information
Number: 209/4
Name: Classifying, separating, and assorting solids > Precedent preparation of items or materials to facilitate separation > Selective differentiation
Description: Methods and apparatus for the treatment of a mixture of materials whereby the physical characteristics of one or more of the components are altered relatively to those of other components to permit or facilitate subsequent separation.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7536827 |
Hydroponic growing enclosure and method for growing, harvesting, processing and distributing algae, related microorganisms and their by products |
May. 26, 2009 |
| 7473407 |
Magnetic separation process for trona |
Jan. 6, 2009 |
| 7232687 |
Multiple sorter monitor and control subsystem for flow cytometer |
Jun. 19, 2007 |
| 7182204 |
Treatment method and device, in particular for excavation material |
Feb. 27, 2007 |
| 6923328 |
Method and apparatus for separating metal values |
Aug. 2, 2005 |
| 6905028 |
Method of separation by altering molecular structures |
Jun. 14, 2005 |
| 6805242 |
Method of reducing phosphate ore losses in a desliming process |
Oct. 19, 2004 |
| 6746873 |
Vibratory system for a sorting flow cytometer |
Jun. 8, 2004 |
| 6719144 |
Method of separating oxide from dross, device for separating oxide from dross, and jet solder tank |
Apr. 13, 2004 |
| 6588597 |
Disposal system for plastic |
Jul. 8, 2003 |
| 6412642 |
Method of applying marking to metal sheet for scrap sorting purposes |
Jul. 2, 2002 |
| 6372506 |
Apparatus and method for verifying drop delay in a flow cytometer |
Apr. 16, 2002 |
| 6206199 |
Method and an apparatus for recycling different components in a multiple layer material |
Mar. 27, 2001 |
| 6193070 |
Apparatus for separating solids drilling fluids |
Feb. 27, 2001 |
| 6158591 |
Method and apparatus for extracting plant resins |
Dec. 12, 2000 |
| 6149012 |
System and method for cleaning and recovering plastic from coated fiber polywaste |
Nov. 21, 2000 |
| 6145666 |
Cleansing contaminants from a heterogeneous material using a sorption agent |
Nov. 14, 2000 |
| 6082548 |
Mobile soil treatment apparatus and method |
Jul. 4, 2000 |
| 5988395 |
Liquid-fluidized bed classifier (LFBC) for sorting waste plastics and other solid waste materials for recycling |
Nov. 23, 1999 |
| 5948276 |
Plastic separation method |
Sep. 7, 1999 |
| 5643796 |
System for sensing droplet formation time delay in a flow cytometer |
Jul. 1, 1997 |
| 5567245 |
Method for separating vinylidene chloride polymer from other polymers |
Oct. 22, 1996 |
| 5500136 |
Simulated gold and gemstone mining operation |
Mar. 19, 1996 |
| 5397066 |
Separation of plastic materials |
Mar. 14, 1995 |
| 5358120 |
Selective separation of finely-divided minerals by addition of selective collector reagent and centrifugation |
Oct. 25, 1994 |
| 5340558 |
Vermiculite composition with improved thermal expansion properties |
Aug. 23, 1994 |
| 5314071 |
Glass sorter |
May. 24, 1994 |
| 5311997 |
Selective separation of finely-divided minerals by addition of selective collector reagent and centrifugation |
May. 17, 1994 |
| 5246115 |
Process for separating heterogeneous plastic material into homogeneous fractions and apparatus useful to this purpose |
Sep. 21, 1993 |
| 5244155 |
Solid-solid separations utilizing alkanol amines |
Sep. 14, 1993 |
| 5227047 |
Wet process for fly ash beneficiation |
Jul. 13, 1993 |
| 5201921 |
Process for identifying plastics by addition of fluorescent dye |
Apr. 13, 1993 |
| 5199652 |
Method for separating a mixture of two plastics with similar specific gravities |
Apr. 6, 1993 |
| 4975182 |
Waterflow differential electrical charging process for ores |
Dec. 4, 1990 |
| 4853133 |
Coal dewatering |
Aug. 1, 1989 |
| 4844351 |
Method for separation, recovery, and recycling of plastics from municipal solid waste |
Jul. 4, 1989 |
| 4839033 |
Apparatus for separating spherical from non-spherical particles |
Jun. 13, 1989 |
| 4775627 |
Coal desulfurization using bacteria adaptation and bacterial modification of pyrite surfaces |
Oct. 4, 1988 |
| H478 |
Selective reduction of sodium in coal by water wash and ion exchange with tailored electrolyte |
Jun. 7, 1988 |
| 4617111 |
Method for the separation of a mixture of polyvinyl chloride and polyethylene terephtalate |
Oct. 14, 1986 |
| 4504453 |
Method of manufacturing crystalline silicon carbide |
Mar. 12, 1985 |
| 4467560 |
Method for sorting of seed |
Aug. 28, 1984 |
| 4440635 |
Process and apparatus for the recovery of cellulose fibers from paper-plastic mixtures |
Apr. 3, 1984 |
| 4410423 |
Separation of spent cathode carbon and alkaline ore |
Oct. 18, 1983 |
| 4368117 |
Process for the selective froth-flotation of sulfidic, oxidic and salt-type minerals |
Jan. 11, 1983 |
| 4326912 |
Process for improving the quality of pulp obtained from wastepaper |
Apr. 27, 1982 |
| 4269700 |
Flotation of inorganic materials from glass using hydrocarbon sulfonates |
May. 26, 1981 |
| 4191739 |
Antigen-antibody reaction assay employing particle aggregation and resistive pulse analysis |
Mar. 4, 1980 |
| 4174075 |
Apparatus for processing waste material chiefly composed of paper and plastic film |
Nov. 13, 1979 |
| 4160722 |
Recovery of plastic from municipal waste |
Jul. 10, 1979 |
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