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. 28, 1986
Filed:
Jul. 26, 1984
Applicant:
Inventor:
Ping I Lee, Valley Cottage, NY (US);
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264-26 ; 264-11 ; 264-27 ; 3511 / ; 523106 ; 525 61 ; 525937 ;
Abstract
Optically clear soft contact lenses of aqueous swollen solid polyvinyl alcohol having a weight average molecular weight of at least 6,000, having been annealed under crystallinity promoting conditions to effectively increase the elastic modulus of the swollen lenses, and optionally subsequently crosslinked, and methods of preparation and the use thereof are disclosed. The lenses are characterized by their relatively high oxygen transmissibility, sufficient to meet the needs of the human cornea, high optical clarity, improved hot water resistance and superior mechanical properties.
Published as:
DK191183D0; PT76605A; PT76606A; GB8311253D0; DK191183A; FI831399A7; FI831399L; NO831506L; AU1403783A; EP0093944A2; GB2119957A; JPS58214128A; BR8302195A; ZA832996B; EP0093944A3; ES8403626A1; GR78537B; KR840004444A; GB2119957B; PT76605B; EP0093944B1; ATE21563T1; DE3365411D1; US4619793A; CA1222357A; JPH0352842B2;