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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 8691120 B1

PDFFull Text
Date of Patent:
Apr. 08, 2014

Filed:

Sep. 15, 2010

Chromene compound

Applicants:

Toshiaki Takahashi, Shunan, JP;

Junji Takenaka, Shunan, JP;

Junji Momoda, Shunan, JP;

Mitsuyoshi Sando, Shunan, JP;

Kazuhiro Teranishi, Shunan, JP;

Inventors:

Toshiaki Takahashi, Shunan, JP;

Junji Takenaka, Shunan, JP;

Junji Momoda, Shunan, JP;

Mitsuyoshi Sando, Shunan, JP;

Kazuhiro Teranishi, Shunan, JP;

Assignee:

Tokuyama Corporation, Shunan-Shi, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Bijan Ahvazi

Int. Cl.
CPC ...
G02B 5/23 (2006.01); F21V 9/00 (2006.01); G02B 5/02 (2006.01); G02C 7/10 (2006.01); G02F 1/361 (2006.01); G03B 11/00 (2006.01); G02F 1/03 (2006.01); G02F 1/07 (2006.01);
U.S. Cl.
CPC ...
Abstract

A photochromic chromene compound having an indeno(2,1-f)naphtho(1,2-b)pyran structure as its basic skeleton, an aryl group or a heteroaryl group at the 6-position carbon atom of the structure and an electron donor group having a Hammett constant σof not more than −0.1 at the 7-position carbon atom.

Find Patent Forward Citations

Takahashi, Toshiaki. (2014). Chromene compound (U.S. Patent No. 8691120). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8691120

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

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