Inventor · disambiguated record
Hans W. Kleffner
Also filed as: KLEFFNER HANS W
10 granted patents·34 citations·filing 1988–1994
86Inventor score
Files withRUETGERSWERKE AG10
Top patents by PatentIndex Score
10 records- 0157US5169990APreparation of 9,9-bis-(4-hydroxyphenyl)-fluoreneRUETGERSWERKE AG·Filed 1992·Granted Dec 8, 1992·6 cites·5 claims
- 0257US5149886APreparation of 9,9-bis-(4-hydroxyphenyl)-fluoreneRUETGERSWERKE AG·Filed 1992·Granted Sep 22, 1992·6 cites·9 claims
- 0356US4942239AProcess for the production of 2-hydroxypyridineRUETGERSWERKE AG·Filed 1989·Granted Jul 17, 1990·4 cites·5 claims
- 0455US5380862APreparation of isomer-free 2,5-dichloro-pyridineRUETGERSWERKE AG·Filed 1993·Granted Jan 10, 1995·6 cites·16 claims
- 0545US5082944AProduction of pyridine-3-sulfonic acidRUETGERSWERKE AG·Filed 1990·Granted Jan 21, 1992·3 cites·3 claims
- 0643US5066806ANovel separation processRUETGERSWERKE AG·Filed 1990·Granted Nov 19, 1991·2 cites·9 claims
- 0736US4925942APreparation of quinuclidine-3-methanolRUETGERSWERKE AG·Filed 1989·Granted May 15, 1990·1 cites·1 claims
- 0830US5271772AHazardous chemical decontamination processRUETGERSWERKE AG·Filed 1992·Granted Dec 21, 1993·2 cites·6 claims
- 0929US4865620AHair dye compositionRUETGERSWERKE AG·Filed 1988·Granted Sep 12, 1989·0 cites·11 claims
- 1026US5456935AFood productsRUETGERSWERKE AG·Filed 1994·Granted Oct 10, 1995·4 cites·4 claims
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