Inventor

HARPEL WILLIAM L

US17 patents

⚠️ This page may combine multiple inventors who share the name “HARPEL WILLIAM L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HARPEL WILLIAM L

BETZ LABORATORIES

Low foaming alkaline cleaner comprising a surfactant mixture of an EO-PO-EO block copolymer and a PO-ZO-PO block copolymer

Non-chromium passivation method and composition for galvanized metal surfaces

Hectorite based paint spray booth detackifying slurries and methods of use thereof

Paint spray booth detackification composition and method

Low phosphorous, low etch cleaner and method

Chromium and fluoride free metal treatment

Composition for a method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metals

Method of monitoring dried-in-place non-chrome polyacrylamide based treatments for aluminum

Treatment for galvanized metal

Visible dried-in-place non-chrome polyacrylamide based treatment for aluminum

Composition for and method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metals

Low phosphorous, low etch cleaner and method

Visible dried-in-place non-chrome treatment for aluminum

BETZDEARBORN INC

Metal cleaning method

Passivation method and composition for galvanized metal surfaces

Passivation method and composition for galvanized metal surfaces

Composition for and method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metals