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:
Jun. 30, 1992
Filed:
Apr. 08, 1991
Applicant:
Inventors:
Thomas G Campbell, Concord, MA (US);
Glenn A Freitas, Foxboro, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F41A / ;
U.S. Cl.
CPC ...
42 7602 ; 89 16 ; 428 344 ; 428 363 ;
Abstract
A nonmetallic tubular structure and method of making the same comprising a tubular ceramic linear surrounded by a thermal insulating composite tube and an outer braided sleeve of a graphite fiber/epoxy composite tensioned to generate compressive stresses in the ceramic liner and maintained in compression by curing the sleeve while under tension.