KOA OIL COMPANY, LIMITED

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01M PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 1153

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5476730 Air cellFeb 12, 91Dec 19, 95[H01M]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5883036 Olefin oligomerization catalyst, process for preparing the same, and olefin oligomerization process using the sameExpiredMar 28, 96Mar 16, 99[B01J]
5462816 Air cellExpiredOct 27, 94Oct 31, 95[H01M]
5277850 Process for producing a coil-shaped carbon fiber bundleExpiredSep 28, 92Jan 11, 94[D01F, D02G]
5240785 Air cellExpiredDec 04, 90Aug 31, 93[H01M]
5204030 Method for producing pitch-type carbon fiberExpiredNov 18, 91Apr 20, 93[D01F]
5190696 Process for preparation of carbonaceous molded body having excellent compressive elasticityExpiredOct 05, 90Mar 02, 93[C01B, H01B]
5183603 Process for producing a coil-shaped carbon fiber bundleExpiredOct 22, 91Feb 02, 93[D01F]
5137667 Process for producing elastic graphite molded productsExpiredSep 10, 91Aug 11, 92[C01B, B29C]
5057297 Method for producing elastic graphite structuresExpiredOct 27, 89Oct 15, 91[C01B]
5017358 Preparation of elastic graphite materialsExpiredSep 15, 89May 21, 91[C01B]
4908200 Method for producing elastic graphite structuresExpiredJul 01, 88Mar 13, 90[C01B]
4873071 Graphite structures and method for production thereofExpiredApr 28, 88Oct 10, 89[C01B]
4828682 Coking processExpiredMay 12, 87May 09, 89[C10G]
4769139 Apparatus for production of crystallizable carbonaceous materialExpiredFeb 14, 86Sep 06, 88[B01D]
4640822 Apparatus for producing bulk mesophaseExpiredApr 13, 83Feb 03, 87[C10C, D01F]
4488957 Method and apparatus for production of crystallizable carbonaceous materialExpiredMay 26, 82Dec 18, 84[C10C, D01F]
4439275 Coke calcining apparatusExpiredDec 09, 82Mar 27, 84[C10B]
4381990 Process for producing mesocarbon microbeads of uniform particle-size distributionExpiredOct 30, 81May 03, 83[C10C, C10B]
4363670 Continuous process for industrially producing mesocarbon microbeadsExpiredJan 05, 81Dec 14, 82[C08L]
4334920 Integrated process for thermal cracking of heavy oil and reduction of iron oresExpiredApr 08, 80Jun 15, 82[C22B]

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