US2976259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 2'-dihydroxy-4-alkoxybenzophenones as ultraviolet light absorbers for resins
Assignee: Wyeth Holdings LLC
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Filing: 1956-09-05
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Granted: 1961-03-21
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Expires: 1976-09-05
Abstract
No abstract record available.
Inventors
- 👤 William B Hardy
- 👤 Warren S Forster
- 👤 Ralph A Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/127; C; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A COMPOSITION OF MATTER WHICH COMPRISES A SUBSTANTIALLY UNIFORM MOLECULAR DISPERSION OF BETWEEN ABOUT 0.001 AND ABOUT 15.0% BY WEIGHT OF A COMPOUND HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
27 words
A COMPOSITION OF MATTER WHICH COMPRISES A SUBSTANTIALLY UNIFORM MOLECULAR DISPERSION OF BETWEEN ABOUT 0.001 AND ABOUT 15.0% BY WEIGHT OF A COMPOUND HAVING THE STRUCTURAL FORMULA:
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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |