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Class Information
Number: 536/76
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Carbohydrates or derivatives > Cellulose or derivative > Esters > Carboxylic acid esters > Acetates > Subsequent treatment process
Description: Processes in which cellulose acetates are purified, recovered, separated, altered physically; or treated chemically wherein the primary intent is merely to modify a property of the cellulose acetate.










Sub-classes under this class:

Class Number Class Name Patents
536/77 Comminuting or centrifuging 12
536/79 Corrosiveness reduced 6
536/82 Halogen containing compound utilized in process 21
536/78 Recovery from photographic film 7
536/81 Stabilizing 12
536/80 Viscosity or degree of polymerization changed (e.g., degrading, cross linking, etc.) 36


Patents under this class:
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Patent Number Title Of Patent Date Issued
5484913 Calcium-modified oxidized cellulose hemostat Jan. 16, 1996
5451672 Process for producing cellulose acetate Sep. 19, 1995
5449555 Cellulose acetate filaments, an optically isotropic spinning solution therefor, and use thereof for the production of filaments Sep. 12, 1995
5371211 Cellulose esters and salts thereof Dec. 6, 1994
5364935 Continuous hydrolysis of cellulose acetate Nov. 15, 1994
5330642 Method of filtering cellulose acetate solutions as well as a plant for carrying out the method Jul. 19, 1994
5328934 Recycling cellulose esters from the waste from cigarette manufacture Jul. 12, 1994
5294703 Process for preparing .alpha.-D-cellobiose octaacetate Mar. 15, 1994
5244734 Fine cellulose particles and process for production thereof Sep. 14, 1993
5214137 Preparation of cellulose diacetate by recycling processed film May. 25, 1993
5202432 Assay for an analyte on a solid porous support Apr. 13, 1993
5175276 Process for the production of cellulose ester fibrets Dec. 29, 1992
5150723 Process for the production of tobacco smoke filters Sep. 29, 1992
5142034 Cellulose ester compositions and process for the preparation thereof Aug. 25, 1992
5064949 Cellulose ester microparticles and process for making the same Nov. 12, 1991
5059659 Surface treatments to impart hydrophilicity Oct. 22, 1991
5026841 Process for the preparation of finely divided porous cellulose particles Jun. 25, 1991
5024232 Novel radiopaque heavy metal polymer complexes, compositions of matter and articles prepared therefrom Jun. 18, 1991
5021201 Process for preparing uniform discoid particles Jun. 4, 1991
4958014 Multi-cellular cellulose particle and process for preparation thereof Sep. 18, 1990
4888420 Water soluble cellulose acetate microspheres Dec. 19, 1989
4882392 Novel radiopaque heavy metal polymer complexes, compositions of matter and articles prepared therefrom Nov. 21, 1989
4837271 Curable mixtures and their use Jun. 6, 1989
4697007 Preparation of microcrystalline triacetylcellulose Sep. 29, 1987
4663447 Porous spherical cellulose acetate particles May. 5, 1987
4638057 Cellulose acetate molding containing odoriferous substance Jan. 20, 1987
4590265 Carboxylated cellulose ester and manufacture thereof May. 20, 1986
4551389 Porous spherical cellulose acetate particles Nov. 5, 1985
4549012 Fluorinated cellulose acetate polymers Oct. 22, 1985
4518433 Enteric coating for pharmaceutical dosage forms May. 21, 1985
4501886 Cellulosic fibers from anisotropic solutions Feb. 26, 1985
4499043 Process for producing a cellulose ester support Feb. 12, 1985
4461892 Process for preparing porous spherical cellulose particles Jul. 24, 1984
4415734 Process for preparation of cellulose acetate Nov. 15, 1983
4390691 Process for preparing porous spherical cellulose particles Jun. 28, 1983
4357295 Process for eliminating haze from articles made of cellulose acetate butyrate Nov. 2, 1982
4342865 High temperature bleaching method for cellulose esters Aug. 3, 1982
4312980 Process for preparing porous cellulose spherical particles Jan. 26, 1982
4306060 Process for preparation of cellulose acetate Dec. 15, 1981
4271291 Process for recovering cellulose ester fines Jun. 2, 1981
4269972 Process for producing cellulose diacetate having improved resistance to delustering phenomenon in hot water May. 26, 1981
4249000 Modified polymers Feb. 3, 1981
4243776 Preparation of non-thrombogenic polymeric material article with platelet anti-aggregative agent Jan. 6, 1981
4234528 Asymmetrical ultrafiltration membrane based on cellulose hydrate Nov. 18, 1980
4228276 Direct precipitation method for producing extrusion-grade cellulose acetate powder and resulting product Oct. 14, 1980
4077971 Tetrahydrophthalimide methyl-2-phenylbenzatriazoles Mar. 7, 1978
4005070 Polymer derivative of -diethylaminoethyl ester of p-aminobenzoic acid with celluloseglycolic acid, method of producing and application thereof Jan. 25, 1977
3971627 Epoxy-azido compounds Jul. 27, 1976

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