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:
Jul. 17, 1984
Filed:
Jun. 22, 1983
Applicant:
Inventors:
Stanley W Huth, Newport Beach, CA (US);
Hali G Wagner, Norco, CA (US);
Assignee:
Allergan Pharmaceuticals, Inc., Irvine, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A01N / ;
U.S. Cl.
CPC ...
424 80 ; 424291 ;
Abstract
A method of preparing solutions containing thimerosal and polyvinylpyrrolidone which results in improved stability of thimerosal is disclosed. The method involves applying a certain amount of heat to the polyvinylpyrrolidone while it is in aqueous solution and prior to its combination with thimerosal. The required thermal input to the polyvinylpyrrolidone solution is a function of four variables: solution temperature, heating time, external pressure and polyvinylpyrrolidone concentration. Advantageously this method may be employed in the manufacture of contact lens solutions.