US2876210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,2'-dihydroxy-4, 4'-substituted benzophenones as ultraviolet absorbents for gr-a rubber
Assignee: GAF Chemicals Corp
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Filing: 1954-02-10
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Granted: 1959-03-03
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Expires: 1974-02-10
Abstract
No abstract record available.
Inventors
- 👤 Robert W Wynn
- 👤 Paul E Hoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132; Y; Y10; Y10S; Y10S8/00; Y10S8/09; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
AN ULTRAVIOLET ABSORBENT COMPOSITION OF MATTER COMPRISING BUTADIENE-ACRYLONITRILE COPOLYMER, WHICH NORMALLY TENDS TO DETERIORATE AND DEGRADE BY EXPOSURE TO ULTRAVIOLET RADIATIONS, HAVING UNIFORMLY DISPERSED THEREIN FROM 0.1 TO 5% BY WEIGHT OF AT LEAST ONE ULTRAVIOLET ABSORBING COMPOUND SELECTED FROM THE GROUP CONSISTING OF 2,2'',4,4''-TETRAHYDROXYBENZOPHENONE AND 2,2''-DIHYDROXY-4,4''-DIALKOXYBENZOPHENONE.
Claim 2
Dependent Claim
47 words
AN ULTRAVIOLET ABSORBENT COMPOSITION OF MATTER COMPRISING BUTADIENE-ACRYLONITRILE COPOLYMER, WHICH NORMALLY TENDS TO DETERIORATE AND DEGRADE BY EXPOSURE TO ULTRAVIOLET RADIATIONS, HAVING UNIFORMLY DISPERSED THEREIN FROM 0.1 TO 5% BY WEIGHT OF AT LEAST ONE ULTRAVIOLET ABSORBING COMPOUND SELECTED FROM THE GROUP CONSISTING OF 2,2'',4,4''-TETRAHYDROXYBENZOPHENONE AND 2,2''-DIHYDROXY-4,4''-DIALKOXYBENZOPHENONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |