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. 18, 2011
Filed:
May. 26, 2004
Katsumi Kawamura, Tokyo, JP;
Takehiko Nakajima, Tokyo, JP;
Daisuke Shoji, Tokyo, JP;
Junzo Tanaka, Tsukuba, JP;
Masanori Kikuchi, Tsukuba, JP;
Toshiyuki Ikoma, Tsukuba, JP;
Katsumi Kawamura, Tokyo, JP;
Takehiko Nakajima, Tokyo, JP;
Daisuke Shoji, Tokyo, JP;
Junzo Tanaka, Tsukuba, JP;
Masanori Kikuchi, Tsukuba, JP;
Toshiyuki Ikoma, Tsukuba, JP;
Hoya Corporation, Tokyo, JP;
National Institute for Materials Science, Ibaraki, JP;
Abstract
A porous composite comprising a porous layer containing a calcium phosphate ceramic, and a dense layer formed on part of the porous layer and having a smaller average pore size than that of the porous layer. The porous composite can be produced by (1) introducing a slurry containing a calcium phosphate ceramic/collagen composite and collagen into a molding die having a high thermal conductivity, (2) rapidly freezing and drying the slurry in the molding die, to form a porous body comprising a porous layer and a dense layer formed on the porous layer, (3) cross-linking collagen in the porous body, and (4) removing the dense layer except for a portion thereof on a surface coming into contact with a soft tissue when implanted in a human body, so that the porous layer is exposed.