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:
Mar. 17, 1987
Filed:
Sep. 30, 1985
Applicant:
Inventor:
Jean-Noel M Bertrand, Wezembeek-Oppem, BE;
Assignee:
Montefina, S.A., Brussels, BE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521 85 ; 521 79 ; 521 88 ; 521 91 ; 521 97 ; 521143 ; 521144 ; 521908 ; 525240 ;
Abstract
Disclosed are rigid materials such as sheets, boards or tubes made of expanded polypropylene, which have a uniform specific gravity d of from about 4.1.times.10.sup.-6 to about 8.1.times.10.sup.-6 Newton/mm.sup.3, a crystallization temperature of from about 115.degree. C. to about 135.degree. C. and a flexural modulus Mf expressed in Newton/mm.sup.3 such that the ratio Mf:d is from about 1.5.times.10.sup.8 to about 1.7.times.10.sup.8 mm.