Assignee
NIPPON PETROLEUM REFINING CO
12 granted patents·73 citations·filing 1978–2005
Top patents by PatentIndex Score
12 records- 0179US6882517B2Raw material composite for carbon material used in electric double layer capacitor, manufacturing method of the same, electric double layer capacitor, and manufacturing method of the sameNIPPON PETROLEUM REFINING CO·Filed 2003·Granted Apr 19, 2005·29 cites·10 claims
- 0274US7666306B2Adsorbent, method for producing same, and method for processing oil-containing waste waterNIPPON PETROLEUM REFINING CO·Filed 2005·Granted Feb 23, 2010·7 cites·4 claims
- 0366US4262843AMethod of and apparatus for controlling the feed amount of air for combustion in a natural draft-type heating furnaceNIPPON PETROLEUM REFINING CO·Filed 1979·Granted Apr 21, 1981·19 cites·15 claims
- 0432US5611894AMethod and apparatus for changing solvent composition in a solvent recovery system of a dewaxing apparatusNIPPON PETROLEUM REFINING CO·Filed 1995·Granted Mar 18, 1997·4 cites·3 claims
- 0530US4220519AMethod of suppressing the rise in surface temperature of heating tubes by ammonia injectionNIPPON PETROLEUM REFINING CO·Filed 1978·Granted Sep 2, 1980·3 cites·4 claims
- 0629US5139330AStandard samples and methods of instrumental measurement of astm color of petroleum products using said samplesNIPPON PETROLEUM REFINING CO·Filed 1991·Granted Aug 18, 1992·4 cites·4 claims
- 0728US5647971AMethod and apparatus for changing solvent composition in a solvent recovery system of a dewaxing apparatusNIPPON PETROLEUM REFINING CO·Filed 1994·Granted Jul 15, 1997·1 cites·1 claims
- 0828US5139329AStandard samples and methods of instrumental measurement of saybolt color of petroleum products using said samplesNIPPON PETROLEUM REFINING CO·Filed 1991·Granted Aug 18, 1992·3 cites·4 claims
- 0925US5381227AStandard materials and methods for instrumental measurement for ASTM color of petroleum products using said standard materialsNIPPON PETROLEUM REFINING CO·Filed 1993·Granted Jan 10, 1995·1 cites·2 claims
- 1024US4559007AFuel burning method in heating furnaceNIPPON PETROLEUM REFINING CO·Filed 1981·Granted Dec 17, 1985·2 cites·3 claims
- 1121US4305452AMethod of pre-heating boiler feed waterNIPPON PETROLEUM REFINING CO·Filed 1980·Granted Dec 15, 1981·0 cites·3 claims
- 1218US5376257AProcess for feed oil refining for production of lubricating oilNIPPON PETROLEUM REFINING CO·Filed 1993·Granted Dec 27, 1994·0 cites·5 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →