US3736289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of unsaturated polyesters and resulting products
Assignee: Shell USA Inc
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Filing: 1971-06-07
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Granted: 1973-05-29
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Expires: 1991-06-07
Abstract
Abstract NEW COMPOSITIONS CONTAINING STABILIZED UNSATURATED POLYESTERS ARE DISCLOSED. THESE COMPOSITIONS COMPRISE: (1) A HYDROXY-CONTAINING ETHYLENICALLY UNSATURATED POLYESTER OF A GLYCIDYL POLYETHER OF A POLYHYDRIC PHENYOL AND AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID, (2) A DISSIMILAR ETHYLNICALLY UNSATURATED MONOMER, AND (3) A HALF ESTER OF AN ALIPHATIC ALCOHOL AND A POLYCARBOXYLIC ACID OR ANHYDRIDE, E.G., A MONO-ALKYL MALEATE. ALSO DISCLOSED IS THE USE OF THE ABOVE STABLIZED POLYESTERS CONTAINING A COPOLYMERIZABLE UNSATURTED MONOMER SUCH AS STYRENE IN THE PREPARATION OF LAMINATES.
Inventors
- 👤 C Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:15
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4292; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |