US2851437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester resin composition containing esterified dibenzoic acids and the process of preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1956-07-23
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Granted: 1958-09-09
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Expires: 1976-07-23
Abstract
No abstract record available.
Inventors
- 👤 John C Petropoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:50
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR PREPARING AN UNSATURATED POLYESTER RESIN COMPOSITION COMPRISING REACTING AN UNSATURATED POLYESTER RESIN WITH A POLYMERIZABLE COMPOUND CONTAINING A POLYMERIZABLE CH2=C< GROUP, WHEREIN SAID POLYESTER RESIN IS THE REACTION PRODUCT OF A POLYHYDRIC ALCOHOL, AN ALPHA, BETA ETHYLENICALLY UNSATURATED POLYCARBOXYLIC ACID AND AN ACID HAVING THE FORMULA:
Claim 2
Dependent Claim
49 words
A PROCESS FOR PREPARING AN UNSATURATED POLYESTER RESIN COMPOSITION COMPRISING REACTING AN UNSATURATED POLYESTER RESIN WITH A POLYMERIZABLE COMPOUND CONTAINING A POLYMERIZABLE CH2=C< GROUP, WHEREIN SAID POLYESTER RESIN IS THE REACTION PRODUCT OF A POLYHYDRIC ALCOHOL, AN ALPHA, BETA ETHYLENICALLY UNSATURATED POLYCARBOXYLIC ACID AND AN ACID HAVING THE 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) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |