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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 10729623 B1

PDFFull Text
Date of Patent:
Aug. 04, 2020

Filed:

May. 02, 2016

Method for producing elliptical, needle-shaped, or rod-shaped polymer particles

Applicant:

Nisshinbo Holdings, Inc., Tokyo, JP;

Inventors:

Kazutoshi Hayakawa, Chiba, JP;

Toshifumi Hashiba, Chiba, JP;

Erina Matsuzaka, Chiba, JP;

Goki Yamada, Chiba, JP;

Assignee:

NISSHINBO HOLDINGS, INC., Tokyo, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Anna R Falkowitz

Int. Cl.
CPC ...
A61K 8/02 (2006.01); A61K 8/81 (2006.01); A61Q 1/12 (2006.01); C08F 2/06 (2006.01); C09D 125/04 (2006.01); C08F 112/08 (2006.01); C09D 133/04 (2006.01); C09D 11/10 (2014.01); C09J 133/04 (2006.01); C08F 212/08 (2006.01); C08F 265/06 (2006.01); C09D 129/00 (2006.01); C09D 157/00 (2006.01); C09J 125/04 (2006.01); C09J 129/00 (2006.01); C08F 12/22 (2006.01); C08F 12/30 (2006.01);
U.S. Cl.
CPC ...
A61K 8/02 (2013.01); A61K 8/0245 (2013.01); A61K 8/81 (2013.01); A61K 8/8152 (2013.01); A61K 8/8158 (2013.01); A61Q 1/12 (2013.01); C08F 2/06 (2013.01); C08F 112/08 (2013.01); C08F 212/08 (2013.01); C08F 265/06 (2013.01); C09D 11/10 (2013.01); C09D 125/04 (2013.01); C09D 129/00 (2013.01); C09D 133/04 (2013.01); C09D 157/00 (2013.01); C09J 125/04 (2013.01); C09J 129/00 (2013.01); C09J 133/04 (2013.01); C08F 12/22 (2013.01); C08F 12/30 (2013.01); C08F 2500/24 (2013.01);
Abstract

A method for producing elliptical, needle-shaped, or rod-shaped polymer particles satisfying (1)-(3) below includes a step in which a synthesis solution including water, a mixed solvent of a hydrophilic organic solvent and a hydrophobic organic solvent, a polymeric stabilizer, a polymerization initiator, and an unsaturated monomer is heated, and, at least after the heating has started, the pH of the synthesis solution is adjusted to 5-9 inclusive to perform solution polymerization: (1) the average (L) length (L) in a two-dimensional projection diagram obtained by irradiating the particles with light from a direction orthogonal to the longitudinal direction is 0.1-80 μm; (2) the average (D) breadth (D) in the two-dimensional projection diagram obtained by irradiating the particles with light from the direction orthogonal to the longitudinal direction is 0.05-40 μm; and (3) the average (P) aspect ratio (L/D) calculated from the length (L) and the breadth (D) is 1.5-30.

Find Patent Forward Citations

Hayakawa, Kazutoshi. (2020). Method for producing elliptical, needle-shaped, or rod-shaped polymer particles (U.S. Patent No. 10729623). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10729623

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

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