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:
Jun. 04, 2019
Filed:
Jul. 11, 2017
Novartis Ag, Basel, CH;
Yongxing Qiu, Suwanee, GA (US);
Newton T. Samuel, Suwanee, GA (US);
John Dallas Pruitt, Suwanee, GA (US);
Chandana Kolluru, Suwanee, GA (US);
Arturo Norberto Medina, Duluth, GA (US);
Lynn Cook Winterton, Keller, TX (US);
Daqing Wu, Suwanee, GA (US);
Xinming Qian, Johns Creek, GA (US);
Jared Nelson, Buford, GA (US);
Novartis AG, Basel, CH;
Abstract
The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves heating a silicone hydrogel contact lens in an aqueous solution in the presence of a water-soluble, highly branched, thermally-crosslinkable hydrophilic polymeric material having positively-charged azetidinium groups, to and at a temperature from about 40° C. to about 140° C. for a period of time sufficient to covalently attach the thermally-crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one azetidinium group and one of the reactive functional groups on and/or near the surface of the silicone hydrogel contact lens, thereby forming a crosslinked hydrophilic coating on the silicone hydrogel contact lens. Such method can be advantageously implemented directly in a sealed lens package during autoclave.