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Norbert Weferling — 36 Patents

CLClariant: 20 patents #9 of 540Top 2%
Hoechst Gmbh: 10 patents #371 of 4,020Top 10%
CGClariant Produkte (Deutschland) Gmbh: 3 patents #32 of 262Top 15%
CGCelanese Gmbh: 1 patents #445 of 478Top 95%
Frechen, DE: #3 of 150 inventorsTop 2%
Overall (All Time): #92,222 of 4,157,543Top 3%
36 Patents All Time
Norbert Weferling has been granted 36 US patents while listed as an inventor at Clariant. The first was granted in 1985 and the most recent in December 2009. Norbert Weferling ranks #92,222 of 4,157,543 US inventors in our database (top 2.2%). Patent records list Norbert Weferling in Frechen, DE.

Issued Patents All Time

Showing 1–25 of 36 patents

Patent #TitleCo-InventorsDate
7635785 Process for preparation of dialkylphosphinic salts Harald Bauer, Werner Krause, Martin Sicken 2009-12-22
7446140 Dialkylphosphinic salts, their use, and a process for their preparation Harald Bauer, Werner Krause, Martin Sicken 2008-11-04
7420007 Dialkylphosphinic salts Harald Bauer, Werner Krause, Martin Sicken 2008-09-02
7348396 Modified polyethylenephosphinic acids and their salts Martin Sicken, Werner Krause, Hans-Peter Schmitz 2008-03-25
7129320 Modified polyethylenephosphinic acids and their salts Martin Sicken, Werner Krause, Hans-Peter Schmitz 2006-10-31
6815558 Process for preparing (metal) alkylphosphonites II — 2004-11-09
6806383 Process for preparing (metal) alkylphosphonites I Martin Sicken 2004-10-19
6770779 Process for preparing alkylphosphonite esters Martin Sicken, Hans-Peter Schmitz, Gunter Kolbe 2004-08-03
6727335 Polymeric phosphinic acids and salts thereof Martin Sicken, Hans-Peter Schmitz 2004-04-27
6583315 Process for preparing ethanebis(alkylphosphinic) acids Martin Sicken, Hans-Peter Schmitz 2003-06-24
6569974 Polymeric phosphinic acids and salts thereof Martin Sicken, Hans-Peter Schmitz 2003-05-27
6534673 Process for preparing salts of dialkylphosphinic acids Hans-Peter Schmitz, Gunter Kolbe 2003-03-18
6420598 Process for preparing alkylphosphonic acids Martin Sicken, Hans-Peter Schmitz 2002-07-16
6359171 Process for preparing dialkylphosphinic acids and their salts Martin Sicken, Gunter Kolbe, Hans-Peter Schmitz 2002-03-19
6355832 Processing for preparing salts of dialkylphosphinic acids Hans-Peter Schmitz, Gunter Kolbe 2002-03-12
6329544 Process for preparing dialkylphosphinic acids Hans-Peter Schmitz, Gunter Kolbe 2001-12-11
6300516 Process for preparing dialkylphosphinic acids Hans-Peter Schmitz, Gunter Kolbe 2001-10-09
6278012 Process for preparing phosphinate esters Sebastian Hörold, Heinz-Peter Breuer, Martin Sicken 2001-08-21
6242642 Process for preparing arylalphosphinic acids Hans-Peter Schmitz 2001-06-05
6232493 Process for preparing metal salts of arylalkylphosphinic acids Hans-Peter Schmitz 2001-05-15
6090967 Process for preparing phosphonous esters Sebastian Hörold, Heinz-Peter Breuer 2000-07-18
6090968 Process for preparing phosphinic esters Sebastian Hörold, Heinz-Peter Breuer 2000-07-18
6011172 Process for alkylating elemental phosphorus Othmar Stelzer, Gunter Kolbe 2000-01-04
5973194 Process for preparing dialkylphosphinate salts Hans-Peter Schmitz, Gunter Kolbe 1999-10-26
5925785 Secondary and tertiary phosphines and processes for their preparation Othmar Stelzer, Oliver Herd 1999-07-20

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