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:
May. 26, 1992
Filed:
Jan. 28, 1991
Applicant:
Inventors:
Shinichiro Morita, Ayabe, JP;
Nobuya Takahashi, Ayabe, JP;
Takeshi Shimamoto, Fukuchiyama, JP;
Kazuya Matsuda, Kyoto, JP;
Shigehiko Suzuki, Kyoto, JP;
Assignee:
Gunze Limited, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
264 28 ; 8 9411 ; 264101 ; 427244 ;
Abstract
A process for preparing a crack-free, dried collagen sponge having a shrinkage factor of up to 14%, including the steps of impregnating crosslinked collagen sponge with an aqueous solution of a hydrophilic organic solvent, freezing the sponge at a temperature of -80.degree. C. or lower, and vacuum-drying the sponge.