US2818400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester resins stabilized with 2-hydroxy-5-salicylylbenzophenone
Assignee: Wyeth Holdings LLC
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Filing: 1956-11-29
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Granted: 1957-12-31
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Expires: 1976-11-29
Abstract
No abstract record available.
Inventors
- 👤 Warren S Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A LIGHT STABLE RESINOUS COMPOSITION COMPRISING A COPOLYMERIZABLE MIXTURE OF (1) AN UNSATURATED POLYESTER RESIN, PREPARED BY REACTING A POLYHYDRIC ALCOHOL WITH AN ALPHA, BETA ETHYLENICALLY UNSATURATED POLYCARBOXYLIC ACID (2) A COMPOUND CONTAINING A POLYMERIZABLE CH2=< GROUP, (3) AN ADDITION POLYMERIZATION CATALYST FOR (1) AND (2) AND (4) 0.01%-5% BY WEIGHT OF 2-HYDROXY-5SALICYLYLBENZOPHENONE.
Claim 2
Dependent Claim
53 words
A LIGHT STABLE RESINOUS COMPOSITION COMPRISING A COPOLYMERIZABLE MIXTURE OF (1) AN UNSATURATED POLYESTER RESIN, PREPARED BY REACTING A POLYHYDRIC ALCOHOL WITH AN ALPHA, BETA ETHYLENICALLY UNSATURATED POLYCARBOXYLIC ACID (2) A COMPOUND CONTAINING A POLYMERIZABLE CH2=< GROUP, (3) AN ADDITION POLYMERIZATION CATALYST FOR (1) AND (2) AND (4) 0.01%-5% BY WEIGHT OF 2-HYDROXY-5SALICYLYLBENZOPHENONE.
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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |