US2945002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 2'-dihydroxy-4, 4'-dimethoxybenzil as an ultraviolet stabilizer
Assignee: Eastman Kodak Co
•
Filing: 1957-05-31
•
Granted: 1960-07-12
•
Expires: 1977-05-31
Abstract
No abstract record available.
Inventors
- 👤 James A Van Allan
- 👤 John W Tamblyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132; C07; C07C; C07C45/00; C07C45/45; C07C45/47; C07C45/61; C07C45/67; C07C45/673; C07C49/00; C07C49/76; C07C49/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A POLYESTER MADE FROM 1,5-PENTANEDIOL, SEBACIC ACID AND P,P''-DICARBOXY DIPHENYL SULFONE CONTAINING 0.1-10% OF 2,2''-DIHYDROXY-4,4''-DIMETHOXYBENZIL.
Claim 2
Dependent Claim
15 words
A POLYESTER MADE FROM 1,5-PENTANEDIOL, SEBACIC ACID AND P,P''-DICARBOXY DIPHENYL SULFONE CONTAINING 0.1-10% OF 2,2''-DIHYDROXY-4,4''-DIMETHOXYBENZIL.
References Cited (Backward Citations)
US2693492A
Cited
US2777828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |