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. 29, 1985
Filed:
Mar. 09, 1984
Taro Suminoe, Tokyo, JP;
Tetsuo Ito, Machida, JP;
Yasuhiro Kiyomatsu, Yokohama, JP;
Takao Shimizu, Toda, JP;
Japan Synthetic Rubber Co., Ltd., Tokyo, JP;
Ricky Contact Lens Research Institute Inc., Tokyo, JP;
Abstract
A process for producing shaped articles having improved surfaces, characterized by subjecting a shaped article of a polymer derived from a monomeric material comprising an acrylate and/or methacrylate to at least one of a hot water treatment, an aqueous alkali solution treatment and an aqueous acid solution treatment. Shaped articles obtained by this process have an advantage that when the surfaces thereof are stained the removal of the stains is quite easy. Moreover, they are hydrophilic and have excellent wettability by water. Therefore, said shaped articles are extremely suitable for use as contact lens.