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.:
Date of Patent:
Aug. 21, 1979
Filed:
Sep. 26, 1977
Applicant:
Inventors:
William H Graham, Huntsville, AL (US);
Inella G Shepard, Huntsville, AL (US);
Assignee:
Thiokol Corporation, Newtown, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; G08G / ;
U.S. Cl.
CPC ...
528 75 ; 525124 ; 528 65 ;
Abstract
Salicylate esters have been found to be suitable blocking agents for polyisocyanates, enabling preparation of hydroxy terminated polybutadiene based polyurethane bound propellant grains having extended pot life. Unblocking occurs readily at normal propellant cure temperatures, allowing normal cure rates.