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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.:

US 4929707 B1

PDFFull Text
Date of Patent:
May. 29, 1990

Filed:

Feb. 03, 1989

Polyurethane base lens resin, plastic lens comprising the resin and

Applicant:
Inventors:

Teruyuki Nagata, Fukuoka, JP;

Koju Okazaki, Fukuoka, JP;

Nobuyuki Kajimoto, Kanagawa, JP;

Tohru Miura, Kanagawa, JP;

Yoshinobu Kanemura, Kanagawa, JP;

Katsuyoshi Sasagawa, Kanagawa, JP;

Assignee:

Mitsui Toatsu Chemicals, Inc., Tokyo, JP;

Attorney:

Burns, Doane, Swecker & Mathis

Primary Examiner:

Maurice J Welsh

Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 76 ; 528 77 ; 528 79 ; 528 85 ;
Abstract

Polyurethane base lens resins obtained by reacting one or more of sulfur-containing polyisocyanates compound with one or more of sulfur-containing polyols, and polyurethane base lenses comprising these resins are disclosed. A method for preparing polyurethane base lenses which comprises adding internal mold releasing agents to the mixture of the above polyisocyanates and polyols prior to casting polymerization is also disclosed.

Find Patent Forward Citations

Nagata, Teruyuki. (1990). Polyurethane base lens resin, plastic lens comprising the resin and (U.S. Patent No. 4929707). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4929707

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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