CRAYON

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20090209678A1
SERIAL NO

12373139

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention provides a crayon having excellent feel when writing while having high gel hardness. The crayon comprises a colorant, a gelling agent, an organic solvent and a resin component, wherein the gelling agent is at least one selected from the group consisting of dibenzylidene sorbitol, tribenzylidene sorbitol and derivatives thereof, and the resin component comprises a combination of polyvinyl butyral resin having an average degree of polymerization of less than 350 and polyvinyl butyral resin having an average degree of polymerization of 350 or more.

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Patent Owner(s)

Patent OwnerAddress
SAKURA COLOR PRODUCTS CORPORATION10-17 NAKAMICHI 1-CHOME HIGASHINARI-KU OSAKA-SHI 537-0025

International Classification(s)

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  • 2007 Application Filing Year
  • C09D Class
  • 773 Applications Filed
  • 421 Patents Issued To-Date
  • 54.47 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances20072008200920102011201220132014201520162017201820192020202120220255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukuo, Hidetoshi Osaka , JP 21 145
Sumitomo, Kotaro Osaka , JP 8 15
Takahashi, Masamitsu Osaka , JP 61 769

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Patent Citation Ranking

  • 2 Citation Count
  • C09D Class
  • 6.49 % this patent is cited more than
  • 16 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges1712570151254751101 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7071 - 8091 - 100100 +0102030405060708090100110120130140

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