Assignee
STELLA CHEMIFA KK
JP·14 granted patents·1 pending application·124 citations·filing 1997–2009
Top patents by PatentIndex Score
15 records- 0179US7268256B2Method of purifying quaternary alkyl ammonium salt and quaternary alkyl ammonium saltSTELLA CHEMIFA KK·Filed 2003·Granted Sep 11, 2007·9 cites·9 claims
- 0272US6585910B1EtchantSTELLA CHEMIFA KK·Filed 1997·Granted Jul 1, 2003·35 cites·2 claims
- 0364US6514474B1Method of purifying lithium hexafluorosphateSTELLA CHEMIFA KK·Filed 1999·Granted Feb 4, 2003·30 cites·5 claims
- 0462US6955795B2Method for producing lithium hexafluorophosphateSTELLA CHEMIFA KK·Filed 2000·Granted Oct 18, 2005·4 cites·10 claims
- 0561US6905606B1Method of removing calcium from water containing calcium hydrogen carbonate in high concentrationSTELLA CHEMIFA KK·Filed 2000·Granted Jun 14, 2005·8 cites·5 claims
- 0660US6666973B1Method for fixing fluorine and phosphorus in waste water containing fluorophosphoric acid-derived compound to remove themSTELLA CHEMIFA KK·Filed 2000·Granted Dec 23, 2003·8 cites·15 claims
- 0759US2009298295A1Method for treating surface of a glass substrateSTELLA CHEMIFA KK·Filed 2009·Application pending·0 cites
- 0857US6884403B2Method of purifying lithium hexafluorophosphateSTELLA CHEMIFA KK·Filed 2003·Granted Apr 26, 2005·1 cites·5 claims
- 0956US7033563B2Method for reducing oxygen component and carbon component in fluorideSTELLA CHEMIFA KK·Filed 2002·Granted Apr 25, 2006·1 cites·13 claims
- 1052US6896866B2Method for purification of tungsten hexafluorideSTELLA CHEMIFA KK·Filed 2000·Granted May 24, 2005·2 cites·10 claims
- 1151US7214362B2Purification method for producing high purity niobium compound and/or tantalum compoundSTELLA CHEMIFA KK·Filed 2003·Granted May 8, 2007·2 cites·16 claims
- 1251US7175823B2Purification method for producing high purity niobium compound and/or tantalum compoundSTELLA CHEMIFA KK·Filed 2003·Granted Feb 13, 2007·2 cites·6 claims
- 1348US6027571ASurface treatment for micromachiningSTELLA CHEMIFA KK·Filed 1997·Granted Feb 22, 2000·14 cites·8 claims
- 1439US6797194B1Surface treating for micromachining and method for surface treatmentSTELLA CHEMIFA KK·Filed 1999·Granted Sep 28, 2004·6 cites·6 claims
- 1529US6699603B1Stainless steel having passive fluoride film formed thereon and equipment manufactured therefromSTELLA CHEMIFA KK·Filed 1998·Granted Mar 2, 2004·2 cites·7 claims
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