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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.:

US 4533397 B1

PDFFull Text
Date of Patent:
Aug. 06, 1985

Filed:

Apr. 09, 1984

Use of polymer alloys based on cellulose esters in contact ophthalmics,

Applicant:
Inventors:

Frank Wingler, Leverkusen, DE;

Helmut Waniczek, Cologne, DE;

Otto-Christian Geyer, Wetzlar, DE;

Assignee:

Bayer Aktiengesellschaft, Leverkusen, DE;

Attorney:

Connolly and Hutz

Primary Examiner:

Theodore Morris

Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
106181 ; 523106 ; 524 37 ; 524 38 ; 524 39 ;
Abstract

Contact lenses prepared from a polymer alloy essentially free from low molecular weight plasticizers and which comprises

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