Assignee
PETOCA LTD
JP·40 granted patents·776 citations·filing 1988–1999
Top patents by PatentIndex Score
40 records- 0184US5855663ACarbon fibers for reinforcement of cement and cement composite materialPETOCA LTD·Filed 1997·Granted Jan 5, 1999·49 cites·9 claims
- 0282US5795843APitch-based activated carbon fiberPETOCA LTD·Filed 1995·Granted Aug 18, 1998·35 cites·2 claims
- 0382US5629062AFiber reinforced plastic pipe and process for producing the samePETOCA LTD·Filed 1996·Granted May 13, 1997·52 cites·3 claims
- 0482US5091164APorous carbon-carbon composite and process for producing the samePETOCA LTD·Filed 1989·Granted Feb 25, 1992·36 cites·2 claims
- 0582US4975262AThree dimensional woven fabrics of pitch-derived carbon fibersPETOCA LTD·Filed 1989·Granted Dec 4, 1990·26 cites·4 claims
- 0681US5652058ACarbon fiber rovings for reinforcement of concretePETOCA LTD·Filed 1995·Granted Jul 29, 1997·39 cites·6 claims
- 0781US5071631APorous carbon-carbon composite and process for producing the samePETOCA LTD·Filed 1989·Granted Dec 10, 1991·33 cites·4 claims
- 0881US4975261AProcess for producing high strength carbon-carbon compositePETOCA LTD·Filed 1988·Granted Dec 4, 1990·35 cites·18 claims
- 0980US5951959AMesophase pitch-based carbon fiber for use in negative electrode of secondary battery and process for producing the samePETOCA LTD·Filed 1996·Granted Sep 14, 1999·39 cites·6 claims
- 1074US5698341ACarbon material for lithium secondary battery and process for producing the samePETOCA LTD·Filed 1996·Granted Dec 16, 1997·49 cites·6 claims
- 1173US6022518ASurface graphitized carbon material and process for producing the samePETOCA LTD·Filed 1997·Granted Feb 8, 2000·36 cites·7 claims
- 1272US6118650AMesophase pitch-based activated carbon fibers and electric double layer capacitor using the samePETOCA LTD·Filed 1998·Granted Sep 12, 2000·45 cites·3 claims
- 1372US5536486ACarbon fibers and non-woven fabricsPETOCA LTD·Filed 1995·Granted Jul 16, 1996·26 cites·1 claims
- 1467US5356574AProcess for producing pitch based activated carbon fibers and carbon fibersPETOCA LTD·Filed 1993·Granted Oct 18, 1994·18 cites·6 claims
- 1567US5283113AProcess for producing carbon fiber feltPETOCA LTD·Filed 1992·Granted Feb 1, 1994·41 cites·10 claims
- 1664US5792577ANegative electrode material for use in lithium-ion secondary battery and process for producing the samePETOCA LTD·Filed 1996·Granted Aug 11, 1998·36 cites·6 claims
- 1762US5308599AProcess for producing pitch-based carbon fiberPETOCA LTD·Filed 1992·Granted May 3, 1994·13 cites·6 claims
- 1858US5004511AProcess for producing non-woven fabrics of carbon fibersPETOCA LTD·Filed 1989·Granted Apr 2, 1991·20 cites·2 claims
- 1956US5686181ACarbon fibers for reinforcement of cement and cement composite materialPETOCA LTD·Filed 1995·Granted Nov 11, 1997·13 cites·4 claims
- 2053US6303095B1Milled carbon fiber and process for producing the samePETOCA LTD·Filed 1994·Granted Oct 16, 2001·9 cites·4 claims
- 2153US5254396ACarbon fiber structure and process for producing the samePETOCA LTD·Filed 1991·Granted Oct 19, 1993·17 cites·6 claims
- 2252US4898723AMethod for producing high strength, high modulus mesophase-pitch based carbon fibersPETOCA LTD·Filed 1988·Granted Feb 6, 1990·9 cites·1 claims
- 2351US5494567AProcess for producing carbon materialsPETOCA LTD·Filed 1994·Granted Feb 27, 1996·8 cites·5 claims
- 2451US5035942AFlexible materials for reflecting electromagnetic wavePETOCA LTD·Filed 1989·Granted Jul 30, 1991·14 cites·2 claims
- 2547US6287729B1Graphite materials for negative electrode used in lithium secondary batteryPETOCA LTD·Filed 1999·Granted Sep 11, 2001·19 cites·5 claims
- 2643US5387333AProcess for producing optically isotropic pitchPETOCA LTD·Filed 1992·Granted Feb 7, 1995·6 cites·3 claims
- 2741US5336557ACarbon fiber felting material and process for producing the samePETOCA LTD·Filed 1991·Granted Aug 9, 1994·9 cites·3 claims
- 2839US5403660AReinforcing carbon fiber and process for producing carbon-carbon compositePETOCA LTD·Filed 1994·Granted Apr 4, 1995·8 cites·2 claims
- 2938US5888928AProcess for producing activated carbon fiber molding and activated carbon fiber moldingPETOCA LTD·Filed 1997·Granted Mar 30, 1999·6 cites·6 claims
- 3038US5605618AProcess for preparing nitrogen-containing isotropic pitch and nitrogen-containing isotropic pitchPETOCA LTD·Filed 1995·Granted Feb 25, 1997·4 cites·7 claims
- 3137US4892722AMethod for producing high strength, high modulus mesophase-pitch-based carbon fibersPETOCA LTD·Filed 1988·Granted Jan 9, 1990·4 cites·1 claims
- 3236US5256343AMethod for producing pitch-based carbon fibersPETOCA LTD·Filed 1991·Granted Oct 26, 1993·3 cites·1 claims
- 3335US5547363ANozzle for spinning pitch-based carbon fibersPETOCA LTD·Filed 1995·Granted Aug 20, 1996·3 cites·4 claims
- 3435US5292473AProcess for preparing pitch for matrixPETOCA LTD·Filed 1993·Granted Mar 8, 1994·3 cites·4 claims
- 3531US5824245AProcesses for preparing milled graphite fibersPETOCA LTD·Filed 1995·Granted Oct 20, 1998·4 cites·1 claims
- 3630US5246639AMethod for producing carbon-carbon composite materialsPETOCA LTD·Filed 1991·Granted Sep 21, 1993·2 cites·3 claims
- 3729US6077463AProcess for producing graphite material for negative electrode used in lithium secondary batteryPETOCA LTD·Filed 1999·Granted Jun 20, 2000·4 cites·5 claims
- 3827US5643547AProcess for producing carbon fibersPETOCA LTD·Filed 1995·Granted Jul 1, 1997·0 cites·2 claims
- 3926US5407614AProcess of making pitch-based carbon fibersPETOCA LTD·Filed 1993·Granted Apr 18, 1995·3 cites·2 claims
- 4023US5272004ACarbon fibers and process for producing the samePETOCA LTD·Filed 1992·Granted Dec 21, 1993·0 cites·2 claims
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