Inventor
William Robert Proops
Inventor
Charleston, WV, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C08Gprimary
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds67%
C08JWorking-up17%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients17%
PatentTitleYear
4,009,129'Copolymers of cyclic vinyl ethers and cyclic acetals'19773,984,360'Lead-free sprayable polyurethane system and rigid cellular products'19763,981,827'Polyurethanes containing brominated cycloaliphatic ester polyols'19763,974,109'Polyurethanes containing halo-aryl amide-ester polyols'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1977Patents assigned to UNION CARBIDE CORP (3)· patent assignee history
1976Patents assigned to WITCO CHEMICAL CORP (1)· patent assignee history
1976Based in Hockessin, DE, US· patent location history
1976Based in Wilmington, DE, US· patent location history
1976Based in Claymont, DE, US· patent location history
1977Based in Charleston, WV, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| UNION CARBIDE CORP | 3 | 1976–1977 |
| WITCO CHEMICAL CORP | 1 | 1976 |
Locations
| Location | Patents | Span |
|---|---|---|
| Charleston, WV, US | 1 | 1977 |
| Hockessin, Delaware, US | 1 | 1976 |
| Wilmington, Delaware, US | 1 | 1976 |
| Claymont, Delaware, US | 1 | 1976 |