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. 26, 1993
Filed:
Feb. 08, 1993
Douglas G Vanderlaan, Jacksonville, FL (US);
Vistakon, Inc., Jacksonville, FL (US);
Abstract
A polymer composition composed of the reaction product of a hydrophilic monomer and an acyclic monomer is disclosed. The preferred hydrophilic monomer is hydroxyethyl methacrylamide (HMA), and the preferred acyclic monomer is hydroxyoctyl methacrylate (HOMA). The monomeric components can be polymerized in a polystyrene mold to make contact lenses, and when swollen with water, are suitable for use as soft hydrogel contact lenses. The preferred compositions also include a zwitterionic monomer, such as a sulfobetaine, and a crosslinking agent, such as ethyleneglycol dimethacrylate (EGDMA). Hydrogel contact lenses made from these polymers exhibit high water content and mechanical strength, and are compatible with polystyrene molds.