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Class Information
Number: 521/921
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Preparing a nonpolyurethane cellular particle from a nonparticulate material
Description: Subject matter involving processes of preparing a particulate nonpolyurethane cellular product from a nonparticulate, noncellular material.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5874521 |
Polymer ahoy material and process for production thereof |
Feb. 23, 1999 |
| 5124363 |
Aqueous air foams of polyhydroxy polymer |
Jun. 23, 1992 |
| 5026735 |
Treatment of hazardous materials with aqueous air foam of polyhydroxy polymer |
Jun. 25, 1991 |
| 4962133 |
Method of making highly adsorptive copolymers |
Oct. 9, 1990 |
| 4676939 |
Process for the production of expanded particles of a polypropylene resin |
Jun. 30, 1987 |
| 4603151 |
Spherical polyvinyl chloride particles |
Jul. 29, 1986 |
| 4471077 |
Microporous polylactide powders and a process for their preparation |
Sep. 11, 1984 |
| 4174430 |
Process for producing porous polystyrene gel |
Nov. 13, 1979 |
| 4073733 |
PVA membrane and method for preparing the same |
Feb. 14, 1978 |
| 4053456 |
Poly(aryloxyphosphazene) copolymers |
Oct. 11, 1977 |
| 4040990 |
Partially pyrolyzed macroporous polymer particles having multimodal pore distribution with macropores ranging from 50-100,000 angstroms |
Aug. 9, 1977 |
| 4007142 |
Amine resin and process |
Feb. 8, 1977 |
| 3985540 |
Metal complexes of hydroxyquinoline and polymeric porous granules |
Oct. 12, 1976 |
| 3985632 |
Small, porous polyacrylate beads |
Oct. 12, 1976 |
| 3960786 |
Process for preparing granular porous silicone rubbers |
Jun. 1, 1976 |
| 3959190 |
Insoluble oxidation reagent |
May. 25, 1976 |
| 3957741 |
Crosslinked, porous, polyacrylate beads |
May. 18, 1976 |
| 3954682 |
Insoluble porous polymeric-phenolic complexes |
May. 4, 1976 |
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