Inventor · disambiguated record
David L. Gefvert
Also filed as: GEFVERT DAVID L
5 granted patents·89 citations·filing 1988–2005
81Inventor score
Top patents by PatentIndex Score
5 records- 0185US7572761B2Process for cleaning and softening fabricsEVONIK DEGUSSA GMBH·Filed 2005·Granted Aug 11, 2009·11 cites·8 claims
- 0285US6737392B1MDEA ester quats with high content of monoester in blends with tea ester quatsGOLDSCHMIDT CHEMICAL CORP·Filed 2003·Granted May 18, 2004·28 cites·24 claims
- 0381US5256187ASeparation of precious metals by an ion exchange processSHEREX CHEM·Filed 1992·Granted Oct 26, 1993·28 cites·15 claims
- 0472US5284633ASolvent extraction of precious metals with hydroxyquinoline and stripping with acidified thioureaSHEREX CHEM·Filed 1992·Granted Feb 8, 1994·19 cites·12 claims
- 0535US4855114ADioxime kinetic enhancer for solvent extraction of gallium from basic aqueous solutions thereofSHEREX CHEM·Filed 1988·Granted Aug 8, 1989·3 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when David L. Gefvert files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →