RWE-DEA AKTIENGESELLSCHAFT FUER MINERALOEL UND CHEMIE

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C10M LUBRICATING COMPOSITIONS 346
 
  
 
C01F COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS 120
 
  
 
C01G COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F 138
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 1361

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6514473 Process for producing hydrotalcites and the metal oxides thereofDec 12, 00Feb 04, 03[C01G, C01F]
5977610 Integrated circuit having resistor formed over multiple tubs of semiconductor materialOct 21, 98Nov 02, 99[H01L]
5830833 Synthetic ester lubricants for refrigerator systemsApr 10, 95Nov 03, 98[C10M]
5800731 Homogeneous electroviscous fluids using aluminum compoundsJun 11, 96Sep 01, 98[C10M]
5474714 Non-polluting shock absorber and level controller fluidsJul 22, 94Dec 12, 95[C10M]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6245253 Liquid composition and its use as magneto-rheological liquidExpiredJun 25, 99Jun 12, 01[H01F]
2001/0001,787 GRANULATION METHOD FOR DIRT-DISSOLVING, AMPHIPHILIC POLYMERS BY COMPRESSED AGGLOMERATIONAbandonedMay 27, 99May 24, 01[C11D]
6180764 Process for producing hydrotalcites by hydrolyzing metal alcoholatesExpiredApr 30, 99Jan 30, 01[C07F, C01F]
5723590 Acid-cleavable surfactants based on alkylglycosidesExpiredMay 23, 96Mar 03, 98[C07H, C11D]
5447643 Aqueous fabric softener for the treatment of textileExpiredJan 06, 94Sep 05, 95[D06M]
5316627 Process for producing odorless dimethyl etherExpiredOct 01, 92May 31, 94[C07C, B01D]
5049292 Lubricant composition for refrigerator systemsExpiredJun 23, 89Sep 17, 91[C10M]
5037511 Process for the production of pure dimethyletherExpiredApr 28, 89Aug 06, 91[C07C, B01D]
5025369 Computer systemExpiredAug 25, 88Jun 18, 91[G06F]
4929668 Aqueous synthetic dispersionsExpiredJul 21, 88May 29, 90[C08J]
4885405 Process for the production of pure dimethylether and a catalyst used in the processExpiredDec 10, 87Dec 05, 89[C07C]
4802956 Process for the purification of dimethylether by distillationExpiredNov 20, 86Feb 07, 89[C07C, B01D]
4737299 Lubricating greases for high operating temperaturesExpiredOct 02, 86Apr 12, 88[C16M]
4709103 Process for the preparation of alkali metal alcoholatesExpiredFeb 14, 86Nov 24, 87[C07C]
4589489 Process for recovering oil from subterranean formationsExpiredNov 19, 84May 20, 86[E21B]
4581475 Process for continuously producing alcoholsExpiredSep 21, 84Apr 08, 86[C07C]
4579175 Method of reducing water productionExpiredAug 10, 84Apr 01, 86[E21B]
4556736 Method for producing crystalline acrylamido alkyl trialkylammonium chloridesExpiredJul 30, 84Dec 03, 85[C07C]
4549813 Apparatus for mixing a solutionExpiredJun 26, 84Oct 29, 85[F16K]
4544776 Process for separating methanol from the reaction products obtained in the etherification of C.sub.4 through C.sub.7 isoolefins with methanolExpiredDec 20, 82Oct 01, 85[C07C]

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