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:
May. 10, 1988
Filed:
Jul. 22, 1986
Nippon Contact Lens, Inc., , JP;
Abstract
The invention relates to novel multifunctional organosiloxane monomers which can be represented by the general formulas: ##STR1## wherein, at least one of 'X.sup.1 '-'X.sup.7 ' is a group of the following structure: ##STR2## and its copolymerization with monofunctional organosiloxane monomers which can be represented by the general formulas: ##STR3## and alkyl and/or cyclic alkyl esters of acrylic, methacrylic acids and/or itaconate esters, and in some cases fluoroalkyl esters of acrylic, methacrylic acids and/or fluoroalkyl itaconate esters to produce excellent oxygen permeable hard contact lens material. Preferably, the copolymer includes cross-linking agents and wetting agents. Contact lenses manufactured from the materials can be easily machined and polished into hard contact lenses having solvent-resistance and sufficient permeabilities.