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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 10975026 B1

PDFFull Text
Date of Patent:
Apr. 13, 2021

Filed:

Oct. 26, 2018

Method for producing polythiol compound, method for producing curable composition, and method for producing cured product

Applicant:

Hoya Lens Thailand Ltd., Pathumthani, TH;

Inventors:

Yukio Kageyama, Tokyo, JP;

Masahisa Kousaka, Tokyo, JP;

Akinori Yamamoto, Tokyo, JP;

Assignee:

HOYA LENS THAILAND LTD., Pathumthani, TH;

Attorney:

Oliff PLC

Primary Examiner:

Tae H Yoon

Int. Cl.
CPC ...
C07C 319/14 (2006.01); C07C 319/20 (2006.01); C07C 335/32 (2006.01); G02B 1/04 (2006.01); C08G 18/24 (2006.01); C08G 18/76 (2006.01); C08G 18/38 (2006.01);
U.S. Cl.
CPC ...
C07C 319/14 (2013.01); C07C 319/20 (2013.01); C07C 335/32 (2013.01); C08G 18/246 (2013.01); C08G 18/3876 (2013.01); C08G 18/7642 (2013.01); G02B 1/04 (2013.01); G02B 1/041 (2013.01);
Abstract

The method for producing a polythiol compound includes reacting 2-mercaptoethanol having a water content of 3000 ppm or less on a mass basis, with epihalohydrin to obtain a halide represented by the formula (1), wherein X represents a halogen atom; and obtaining at least one polythiol compound selected from the group consisting of a polythiol compound represented by the formula (4), a polythiol compound represented by the formula (5), a polythiol compound represented by the formula (6), and a polythiol compound represented by the formula (7).

Find Patent Forward Citations

Kageyama, Yukio. (2021). Method for producing polythiol compound, method for producing curable composition, and method for producing cured product (U.S. Patent No. 10975026). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10975026

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

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