US2773778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic film-forming plastic containing 2, 2', 4, 4'-tetrahydroxybenzophenone as ultraviolet absorbent
Assignee: GAF Chemicals Corp
•
Filing: 1951-09-07
•
Granted: 1956-12-11
•
Expires: 1971-09-07
Abstract
No abstract record available.
Inventors
- 👤 Paul E Hoch
- 👤 Robert W Wynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
AN ULTRAVIOLET ABSORBING COMPOSITION OF MATTER COMPRISING A LIGHT-TRANSMITTING ORGANIC FILM-FORMING PLASTIC CARRIER HAVING UNIFORMLY DISPERSED THEREIN 2,2'',4,4''-TETRAHYDROXYBENZOPHENONE.
Claim 2
Dependent Claim
18 words
AN ULTRAVIOLET ABSORBING COMPOSITION OF MATTER COMPRISING A LIGHT-TRANSMITTING ORGANIC FILM-FORMING PLASTIC CARRIER HAVING UNIFORMLY DISPERSED THEREIN 2,2'',4,4''-TETRAHYDROXYBENZOPHENONE.
References Cited (Backward Citations)
US1941710A
Cited
US1989683A
Cited
US2062179A
Cited
US2264291A
Cited
US2565141A
Cited
US2568894A
Cited
US2528338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |