IP Library › Granted Patent US 7,258,906
Granted Patent B2
US 7,258,906 · App. 11/475,588 · Granted Aug 21, 2007

Surface treatment of fluorinated contact lens materials

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Quick Facts
Patent No.
US 7,258,906
App. No.
11/475,588
Granted
Aug 21, 2007
Kind
B2
Abstract

Hydrogen-plasma modification of fluorinated polymers reduces the surface chemistry of this polymer removing fluorine, leaving behind a carbon-enriched surface that is further plasma processed into a hydrophilic surface for a lens material to be inserted into the ocular environment.

Claims (1)

1. A fluorinated contact lens containing a fluorinated bulk material and a surface coating which, when the lens is in the unhydrated state, has a surface coating characterized by an oxygen content within a depth of about 74 ångstroms that is at least 2 mole percent enriched relative to the bulk material, based on XPS analysis.

Assignments (2)
RELEASE OF SECURITY INTEREST Recorded Aug 5, 2012
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: BAUSCH & LOMB INCORPORATED
Reel/Frame 028726/0142 →
SECURITY AGREEMENT Recorded Mar 26, 2008
From: BAUSCH & LOMB INCORPORATED; WP PRISM INC.; B&L CRL INC.; B&L CRL PARTNERS L.P.; B & L DOMESTIC HOLDINGS CORP.; B&L FINANCIAL HOLDINGS CORP.; B&L SPAF INC.; B&L VPLEX HOLDINGS, INC.; BAUSCH & LOMB CHINA, INC.; BAUSCH & LOMB INTERNATIONAL INC.; BAUSCH & LOMB REALTY CORPORATION; BAUSCH & LOMB SOUTH ASIA, INC.; BAUSCH & LOMB TECHNOLOGY CORPORATION; IOLAB CORPORATION; RHC HOLDINGS, INC.; SIGHT SAVERS, INC.; WILMINGTON MANAGEMENT CORP.; WILMINGTON PARTNERS L.P.; B&L MINORITY DUTCH HOLDINGS LLC
To: CREDIT SUISSE
Reel/Frame 020733/0765 →