Inventor · disambiguated record
Ulrich Welkener
Also filed as: WELKENER ULRICH
4 granted patents·138 citations·filing 1986–1992
80Inventor score
Top patents by PatentIndex Score
4 records- 0190US5234547ACreping aidGRACE W R & CO·Filed 1992·Granted Aug 10, 1993·58 cites·8 claims
- 0274US5300194APitch controlGRACE W R & CO·Filed 1991·Granted Apr 5, 1994·40 cites·10 claims
- 0362US4743339AMethod for controlling the digestion of pulp by IR spectroscopyFAIX OSKAR·Filed 1986·Granted May 10, 1988·30 cites·10 claims
- 0449US5266078AEnhancement of fluorescent whitening agents: water-soluble phosphonates and carboxylates for coating paperGRACE W R & CO·Filed 1991·Granted Nov 30, 1993·10 cites·25 claims
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