Inventor · disambiguated record
Kazufumi Kai
Also filed as: KAI KAZUFUMI
12 granted patents·7 pending applications·20 citations·filing 1998–2015
84Inventor score
Top patents by PatentIndex Score
19 records- 0184US8163860B2Norbornene copolymer and production method thereofKAITA SHOJIRO·Filed 2010·Granted Apr 24, 2012·5 cites·14 claims
- 0279US6376702B1Ether compound, production thereof and curable compositionsSHOWA DENKO KK·Filed 2000·Granted Apr 23, 2002·10 cites·23 claims
- 0359US2009192279A1Radically Polymerizable Sulfur-Containing Compound and Radically Polymerizable Sulfur-Containing PolymerSHOWA DENKO KK·Filed 2009·Application pending·0 cites
- 0458US6846900B2Polyvalent carboxylic acid ester, process for producing the carboxylic acid ester, plastic lens composition using the carboxylic ester, plastic lens obtained by curing the composition and process for producing the plastic lensSHOWA DENKO KK·Filed 2002·Granted Jan 25, 2005·2 cites·7 claims
- 0554US2011124815A1Polyurethane and production method thereofSHOWA DENKO KK·Filed 2009·Application pending·0 cites
- 0649US7939612B2Radically polymerizable compound having a cyclic dithiocarbonate groupSHOWA DENKO KK·Filed 2007·Granted May 10, 2011·0 cites·20 claims
- 0749US7518001B2Radically polymerizable sulfur-containing compound and radically polymerizable sulfur-containing polymerSHOWA DENKO KK·Filed 2005·Granted Apr 14, 2009·0 cites·13 claims
- 0848US8518524B2Transparent composite materialKADOWAKI YASUSHI·Filed 2007·Granted Aug 27, 2013·0 cites·35 claims
- 0948US6740721B2Plastic lens composition, plastic lens, and process for producing the plastic lensSHOWA DENKO KK·Filed 2001·Granted May 25, 2004·1 cites·56 claims
- 1043US2010286354A1Allyl alcohol copolymer and production method thereofSHOWA DENKO KK·Filed 2008·Application pending·0 cites
- 1139US7569327B2Curable polymer compoundSHOWDA DENKO K K·Filed 2004·Granted Aug 4, 2009·0 cites·30 claims
- 1238US8119039B2Transparent conductive substrateKADOWAKI YASUSHI·Filed 2007·Granted Feb 21, 2012·0 cites·44 claims
- 1338US7049350B2Polymerizable compound, polymerizable composition and cured product containing the compoundSHOWA DENKO KK·Filed 2002·Granted May 23, 2006·0 cites·17 claims
- 1438US2017341342A1Light control panel and optical imaging deviceSHOWA DENKO KK·Filed 2015·Application pending·0 cites
- 1537US7038076B2Fumarate derivative, method for producing the sameSHOWA DENKO KK·Filed 2001·Granted May 2, 2006·0 cites·3 claims
- 1637US2004236064A1Plastic lens material, plastic lens composition, plastic lens obtained by curing the composition and process for producing the plastic lensFiled 2002·Application pending·0 cites
- 1735US2002002306A1Method for producing fumaric acid estersFiled 2001·Application pending·0 cites
- 1834US6204410B1Ether compounds and process for producing the sameSHOWA DENKO KK·Filed 1998·Granted Mar 20, 2001·2 cites·10 claims
- 1934US2003131548A1Material for plastic lens, production process of the material, composition for plastic lens, plastic lens obtained by curing the composition, and production process of the plastic lensFiled 2001·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Kazufumi Kai files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →