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:
Feb. 03, 1998
Filed:
Feb. 26, 1996
Applicant:
Inventors:
John M Evans, Fremont, CA (US);
William E Meyers, San Ramon, CA (US);
Joseph Weinschenk, Laguna Niguel, CA (US);
Assignee:
Pilkington Barnes Hind, Inc., Sunnyvale, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
B65D / ; B29D / ;
U.S. Cl.
CPC ...
206204 ; 206210 ; 206-51 ; 264-26 ;
Abstract
Disclosed are methods for extracting leachable materials from a hydratable polymer by incorporation of an adsorbent into the solution employed to effect extraction. Suitable adsorbents are characterized as having a higher affinity for the leachable materials than either the hydratable polymer or the solvent employed in the solution. Also disclosed are sealed packages comprising an aqueous solution, an adsorbent and a hydratable polymer in the form of an ophthalmic device.