Inventor · disambiguated record
William L. Harpel
Also filed as: HARPEL WILLIAM L
17 granted patents·302 citations·filing 1984–1997
95Inventor score
Top patents by PatentIndex Score
17 records- 0188US4504395APaint spray booth detackification composition and methodBETZ LABORATORIES·Filed 1984·Granted Mar 12, 1985·49 cites·4 claims
- 0287US5114607ALow foaming alkaline cleaner comprising a surfactant mixture of an EO-PO-EO block copolymer and a PO-ZO-PO block copolymerBETZ LABORATORIES·Filed 1990·Granted May 19, 1992·61 cites·3 claims
- 0383US4564464AHectorite based paint spray booth detackifying slurries and methods of use thereofBETZ LABORATORIES·Filed 1984·Granted Jan 14, 1986·44 cites·3 claims
- 0475US5909742AMetal cleaning methodBETZDEARBORN INC·Filed 1993·Granted Jun 8, 1999·29 cites·4 claims
- 0565US5344505ANon-chromium passivation method and composition for galvanized metal surfacesBETZ LABORATORIES·Filed 1993·Granted Sep 6, 1994·22 cites·6 claims
- 0664US5545347ALow phosphorous, low etch cleaner and methodBETZ LABORATORIES·Filed 1995·Granted Aug 13, 1996·18 cites·4 claims
- 0758US5344504ATreatment for galvanized metalBETZ LABORATORIES·Filed 1993·Granted Sep 6, 1994·19 cites·1 claims
- 0854US5518555AChromium and fluoride free metal treatmentBETZ LABORATORIES·Filed 1995·Granted May 21, 1996·10 cites·6 claims
- 0944US5772740APassivation method and composition for galvanized metal surfacesBETZDEARBORN INC·Filed 1997·Granted Jun 30, 1998·8 cites·4 claims
- 1044US5700525APassivation method and composition for galvanized metal surfacesBETZDEARBORN INC·Filed 1996·Granted Dec 23, 1997·8 cites·4 claims
- 1143US5401333AMethod of monitoring dried-in-place non-chrome polyacrylamide based treatments for aluminumBETZ LABORATORIES·Filed 1994·Granted Mar 28, 1995·9 cites·1 claims
- 1240US5451270AComposition for a method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metalsBETZ LABORATORIES·Filed 1994·Granted Sep 19, 1995·5 cites·5 claims
- 1339US5505792AVisible dried-in-place non-chrome polyacrylamide based treatment for aluminumBETZ LABORATORIES·Filed 1993·Granted Apr 9, 1996·7 cites·10 claims
- 1436US5472630ALow phosphorous, low etch cleaner and methodBETZ LABORATORIES·Filed 1994·Granted Dec 5, 1995·4 cites·7 claims
- 1535US5500053AComposition for and method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metalsBETZ LABORATORIES·Filed 1995·Granted Mar 19, 1996·3 cites·2 claims
- 1635US5292378AVisible dried-in-place non-chrome treatment for aluminumBETZ LABORATORIES·Filed 1993·Granted Mar 8, 1994·5 cites·4 claims
- 1731US5641537AComposition for and method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metalsBETZDEARBORN INC·Filed 1995·Granted Jun 24, 1997·1 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →