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Class Information
Number: 521/185
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > Cellular products or processes of preparing a cellular product, e.g., foams, pores, channels, etc. > Cellular product derived from a -c-c(=x)-x containing reactant wherein x is a chalcogen atom, e.g., phthalic acid, etc. > Nitrogen containing reactant > Nitrogen reactant contains at least two amino nitrogen atoms > Carbocyclic reactant containing -c-c(=x)-x, e.g., containing carboxyl, etc.
Description: Subject matter wherein the -C X containing reactant is part of a compound which contains a carbocyclic ring.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7074880 |
Polyimide aerogels, carbon aerogels, and metal carbide aerogels and methods of making same |
Jul. 11, 2006 |
| 6924322 |
Thio-,amine-,nitro-,and macrocyclic containing organic aerogels & xerogels |
Aug. 2, 2005 |
| 6814910 |
Aromatic polyimide foam |
Nov. 9, 2004 |
| 6576683 |
Aromatic polyimide foam |
Jun. 10, 2003 |
| 6486285 |
Water-swellable polymer gel and process for preparing the same |
Nov. 26, 2002 |
| 6472443 |
Porous polymer media |
Oct. 29, 2002 |
| 6399669 |
Porous material and a method for producing the same |
Jun. 4, 2002 |
| 6391932 |
Porous materials |
May. 21, 2002 |
| 6342454 |
Electronic devices with dielectric compositions and method for their manufacture |
Jan. 29, 2002 |
| 6235803 |
Hollow polymide microspheres |
May. 22, 2001 |
| 6172127 |
Preparation of polyimide foam |
Jan. 9, 2001 |
| 6133330 |
Aromatic polyimide foam |
Oct. 17, 2000 |
| 6057379 |
Method of preparing polyimide foam with excellent flexibility properties |
May. 2, 2000 |
| 5994418 |
Hollow polyimide microspheres |
Nov. 30, 1999 |
| 5830987 |
Amino-acrylate polymers and method |
Nov. 3, 1998 |
| 5824766 |
Polyamideamic acid resin prepolymers, high heat resistant polyamideimide foams prepared therefrom, and processes for preparing them |
Oct. 20, 1998 |
| 5731359 |
Vibration-absorbing elements |
Mar. 24, 1998 |
| 5525644 |
Potted electrical components and methods of making the same |
Jun. 11, 1996 |
| 5510395 |
Film forming solution, porous film obtained therefrom and coated material with the porous film |
Apr. 23, 1996 |
| 5338765 |
Method of and apparatus for continuously foaming a polyimide powder |
Aug. 16, 1994 |
| 5322916 |
Method for the preparation of amide oligomers and polybenzazole polymers therefrom |
Jun. 21, 1994 |
| 5298531 |
Process for the preparation of polyimide foam |
Mar. 29, 1994 |
| 5286760 |
Process for reducing impurity levels in methylene diphenyamines |
Feb. 15, 1994 |
| 5234966 |
Polyimide foam of desired density |
Aug. 10, 1993 |
| 5225450 |
Unfoamed foil suitable as an adhesive |
Jul. 6, 1993 |
| 5198475 |
Polyol and utilization thereof |
Mar. 30, 1993 |
| 5192810 |
Method and apparatus for manufacturing dimpled structures from elastic cloth |
Mar. 9, 1993 |
| 5135959 |
Method of impregnating reticulated foam with polymide foam and products thereof |
Aug. 4, 1992 |
| 5122546 |
Polyimide foam precursor |
Jun. 16, 1992 |
| 5096932 |
Polyimide foam products and methods |
Mar. 17, 1992 |
| 5077318 |
Method for producing polyimide foam of desired density |
Dec. 31, 1991 |
| 5064867 |
Production of foamed polymer structures |
Nov. 12, 1991 |
| 5047436 |
Method of improving foam fire resistance through the introduction of inorganic particles thereinto |
Sep. 10, 1991 |
| 5036111 |
Expanded materials with nadimide resin base |
Jul. 30, 1991 |
| 5009696 |
Fertilizer with a degradative coating |
Apr. 23, 1991 |
| 4999070 |
New articles of manufacture and their production |
Mar. 12, 1991 |
| 4994501 |
Foaming putty plug repair composition and method |
Feb. 19, 1991 |
| 4988739 |
Method of improving foam fire resistance through the introduction of metal oxides thereinto |
Jan. 29, 1991 |
| 4980389 |
Polyetherimide foam precursors and foams having improved physical properties and methods of making them |
Dec. 25, 1990 |
| 4980102 |
Method of manufacturing polyimide foam shapes having improved density and cell size uniformity |
Dec. 25, 1990 |
| 4980004 |
Method of manufacturing polyimide foam shapes having improved density and cell size uniformity |
Dec. 25, 1990 |
| 4978692 |
Polyimide foam |
Dec. 18, 1990 |
| 4978690 |
Method of making porous inorganic particle filled polyimide foam insulation products |
Dec. 18, 1990 |
| 4962132 |
Method of improving foam fire resistance through the introduction of inorganic particles thereinto |
Oct. 9, 1990 |
| 4952611 |
Polyimide foams and their production |
Aug. 28, 1990 |
| 4946873 |
Prepolymers containing imide linkages |
Aug. 7, 1990 |
| 4944902 |
Polyimide compositions and processes |
Jul. 31, 1990 |
| 4943599 |
Recurable and cured cellular materials |
Jul. 24, 1990 |
| 4943598 |
Recurable and cured cellular materials |
Jul. 24, 1990 |
| 4935452 |
Method of improving foam fire resistance through the introduction of metal oxides thereinto |
Jun. 19, 1990 |
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