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:
Oct. 29, 1991
Filed:
Sep. 14, 1989
Applicant:
Inventor:
David R Dillehay, Marshall, TX (US);
Assignee:
Thiokol Corporation, Ogden, UT (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C06B / ; D01D / ;
U.S. Cl.
CPC ...
264-33 ; 86 2012 ; 149 1992 ;
Abstract
Substituting non-metallic screw elements for the previously used metal screw elements in twin-screw extruders reduces the hazards inherent in the extrusion of highly energetic materials which exhibit impact and friction sensitivity when processed in twin screw extruders with metal screw elements.