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:
Nov. 21, 1978
Filed:
Mar. 28, 1977
Murray J Sibley, Berkeley, CA (US);
Gordon H Yung, Sunnyvale, CA (US);
Petronio D Urrea, Pleasanton, CA (US);
Barnes-Hind Pharmaceuticals, Inc., Sunnyvale, CA (US);
Abstract
Method and compositions are provided for the effective cleaning of soft and silicone contact lenses by soaking the lenses for a time sufficient to remove adherent residues in a solution containing an epoxy modified silicone surfactant and a fatty acid amide (or nitrogen analog thereof) surfactant, which may be cationic or non-ionic. Other additives may also be included such as thickening agents, bactericides, salts, anionic surfactants, and the like. The compositions are found to be particularly effective in removing strongly adhering proteinaceous matter, as well as lipids and polysaccharides. By employing a particular combination of surfactants, soft contact lenses can be freed of impurities and adhering matter introduced during manufacture of the lens, while the lens is being hydrated. The lens is soaked under moderate conditions in an aqueous saline bath with a combination of a zwitterion surfactant and a fatty acid amide surfactant.