Inventor · disambiguated record
Darrel R. Colwell
Also filed as: COLWELL DARREL R
2 granted patents·17 citations·filing 1981–1982
58Inventor score
Technology areasB01D
Top patents by PatentIndex Score
2 records- 0137US4344825AMethods and apparatus for separating cleaning solvents from rosin flux and other contaminantsWESTERN ELECTRIC CO·Filed 1981·Granted Aug 17, 1982·10 cites·18 claims
- 0231US4464227AMethods and apparatus for distilling a contaminated solventAT & T TECHNOLOGIES INC·Filed 1982·Granted Aug 7, 1984·7 cites·4 claims
Join the waitlist — get patent alerts
Get an alert when Darrel R. Colwell 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 →