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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4092274 B1

PDFFull Text
Date of Patent:
May. 30, 1978

Filed:

Jul. 26, 1976

Polymeric foams from cross-linkable poly-n-ary lenebenzimidazoles

Applicant:
Inventors:

James C Fletcher, , US;

Edward S Harrison, San Diego, CA (US);

Chadwick B Delano, Sunnyvale, CA (US);

Salvatore R Riccitiello, San Jose, CA (US);

Assignee:

Other;

Attorneys:

Brekke; Darrell G.

Manning; John R.

Primary Examiner:

Morton Foelak

Int. Cl.
CPC ...
C08V / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ; 260 7841 ;
Abstract

Foamed cross-linked poly-N-arylenebinzimidazoles are prepared by mixing an organic tetraamine and an ortho substituted aromatic dicarboxylic acid anhydride in the presence of a blowing agent and then heating the prepolymer to a temperature sufficient to complete polymerization and foaming of the reactants. In another embodiment of the process, the reactants are heated to form a prepolymer. The prepolymer is then cured at higher temperatures to complete foaming and polymerization.

Find Patent Forward Citations

Fletcher, James. (1978). Polymeric foams from cross-linkable poly-n-ary lenebenzimidazoles (U.S. Patent No. 4092274). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4092274

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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