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:
Jul. 02, 1996
Filed:
Nov. 01, 1993
Applicant:
Inventors:
Edward S Harrison, Encinitas, CA (US);
Edward J Ruskowski, Carlsbad, CA (US);
James Melquist, San Diego, CA (US);
Assignee:
McDonnell Douglas Technologies Inc., San Diego, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
523218 ; 4283044 ; 4283133 ; 4283139 ; 4283142 ; 4283144 ; 4283155 ; 4284735 ; 521 54 ; 521 55 ; 521134 ; 521135 ; 521138 ; 523219 ;
Abstract
A low-density, porous material is prepared by mixing together microballoons and an oligomeric precursor to a polyetherimide polymer. The oligomeric precursor has an initial viscosity sufficiently low that it can flow and wet the microballoons when first heated to a polymerization processing temperature, and thereafter polymerize. Fibers may be controllably incorporated into the material during processing to impart specific properties, and air may be controllably incorporated into the material during processing to further decrease its density.