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. 09, 1990
Filed:
Nov. 03, 1988
Applicant:
Inventor:
Paul Harisiades, Woodhaven, NY (US);
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
528 33 ; 528 28 ; 525453 ; 525474 ; 525477 ;
Abstract
A novel polysiloxane polyurethane is described which is obtained by reaction of an isocyanate capped polysiloxane prepolymer with a polysiloxane-disilanol and which contains O-silyl-urethane linkages. The novel polysiloxane-polyurethanes are useful as oxygen permeable membranes or films, as bandages and drug carriers, for example in transdermal drug delivery, and especially as highly oxygen permeable, soft contact lenses.