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. 09, 1993
Filed:
Sep. 09, 1991
Applicant:
Inventors:
Qi-Bin Bao, Livingston, NJ (US);
Paul A Higham, Ringwood, NJ (US);
Assignee:
Pfizer Hospital Products Group, Inc., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
A61F / ;
U.S. Cl.
CPC ...
623 17 ; 623 11 ; 623 16 ;
Abstract
A prosthetic nucleus for implantation in the disc space after removal of a damaged or degenerated nucleus is formed from a multiplicity of hydrogel beads having a water content of at least 30%. The beads are covered by a semi-permeable membrane. The membrane has porosity less than the size of the beads to thereby retain the beads therein but permit fluids to flow in and out of the prosthetic nucleus.
Published as:
CA2094135A1; IE914456A1; WO9210982A1; AU1338592A; PT99889A; US5192326A; DE9190192U1; EP0563332A1; JPH05508795A; AU654173B2; EP0662309A1; EP0563332B1; ATE126688T1; DE69112425D1; ES2076028T3; DK0563332T3; GR3017783T3; DE69112425T2; CA2094135C; IE69177B1; JP2530089B2; EP0662309B1; ATE192032T1; DE69132149D1; DE69132149T2;