Assignee
KOA OIL CO LTD
JP·23 granted patents·297 citations·filing 1976–1996
Top patents by PatentIndex Score
23 records- 0188US4295092AApparatus for and method of detecting and measuring corrosion damage in pipeKOA OIL CO LTD·Filed 1978·Granted Oct 13, 1981·58 cites·25 claims
- 0276US4100265AProcess for preparation of high quality cokeKOA OIL CO LTD·Filed 1976·Granted Jul 11, 1978·23 cites·6 claims
- 0370US5883036AOlefin oligomerization catalyst, process for preparing the same, and olefin oligomerization process using the sameKOA OIL CO LTD·Filed 1996·Granted Mar 16, 1999·40 cites·9 claims
- 0469US5462816AAir cellKOA OIL CO LTD·Filed 1994·Granted Oct 31, 1995·41 cites·11 claims
- 0565US4488957AMethod and apparatus for production of crystallizable carbonaceous materialKOA OIL CO LTD·Filed 1982·Granted Dec 18, 1984·12 cites·10 claims
- 0665US4080283AProcess for continuous production of pitchKOA OIL CO LTD·Filed 1977·Granted Mar 21, 1978·14 cites·14 claims
- 0757US5190696AProcess for preparation of carbonaceous molded body having excellent compressive elasticityKOA OIL CO LTD·Filed 1990·Granted Mar 2, 1993·14 cites·10 claims
- 0855US4381990AProcess for producing mesocarbon microbeads of uniform particle-size distributionKOA OIL CO LTD·Filed 1981·Granted May 3, 1983·10 cites·6 claims
- 0948US4363670AContinuous process for industrially producing mesocarbon microbeadsKOA OIL CO LTD·Filed 1981·Granted Dec 14, 1982·7 cites·7 claims
- 1046US4439275ACoke calcining apparatusKOA OIL CO LTD·Filed 1982·Granted Mar 27, 1984·6 cites·8 claims
- 1144US4094776AMethod for treatment of oil-containing waste water by using an oil adsorbentKOA OIL CO LTD·Filed 1976·Granted Jun 13, 1978·9 cites·6 claims
- 1243US4169767AProcess for calcining cokeKOA OIL CO LTD·Filed 1978·Granted Oct 2, 1979·9 cites·7 claims
- 1341US5057297AMethod for producing elastic graphite structuresKOA OIL CO LTD·Filed 1989·Granted Oct 15, 1991·7 cites·1 claims
- 1439US5476730AAir cellKOA OIL CO LTD·Filed 1989·Granted Dec 19, 1995·11 cites·5 claims
- 1538US5183603AProcess for producing a coil-shaped carbon fiber bundleKOA OIL CO LTD·Filed 1991·Granted Feb 2, 1993·4 cites·9 claims
- 1638US5137667AProcess for producing elastic graphite molded productsKOA OIL CO LTD·Filed 1991·Granted Aug 11, 1992·5 cites·5 claims
- 1738US4265710AProcess for calcining cokeKOA OIL CO LTD·Filed 1979·Granted May 5, 1981·7 cites·10 claims
- 1837US4828682ACoking processKOA OIL CO LTD·Filed 1987·Granted May 9, 1989·5 cites·1 claims
- 1935US4640822AApparatus for producing bulk mesophaseKOA OIL CO LTD·Filed 1983·Granted Feb 3, 1987·3 cites·3 claims
- 2033US4769139AApparatus for production of crystallizable carbonaceous materialKOA OIL CO LTD·Filed 1986·Granted Sep 6, 1988·2 cites·1 claims
- 2131US5240785AAir cellKOA OIL CO LTD·Filed 1990·Granted Aug 31, 1993·9 cites·14 claims
- 2228US5204030AMethod for producing pitch-type carbon fiberKOA OIL CO LTD·Filed 1991·Granted Apr 20, 1993·0 cites·2 claims
- 2328US4209382AOil adsorbent and process for preparation thereofKOA OIL CO LTD·Filed 1978·Granted Jun 24, 1980·1 cites·10 claims
Join the waitlist — get patent alerts
Get an alert when KOA OIL CO LTD files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →