US2835649A
Expired / Lapsed
US
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Stabilization of an unsaturated polyester with a mixture comprising resorcinol monobenzoate and a mono or dihydroxy benzophenone
Assignee: FERRO CHEMICAL Corp
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Filing: 1957-03-15
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Granted: 1958-05-20
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Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Albright M Nicholson
- 👤 Stanley B Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132; C08K5/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A COMPOSITION OF MATTER COMPRISING AN UNSATURATED POLYESTER OF A GLYCOL AND DICARBOXYLIC ACID AT LEAST A PART OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF MALEIC, FUMARIC AND ENDOMETHYLENE TETRAHYDROPHTHALIC ACIDS AND FROM ABOUT 0.01% TO ABOUT 10% OF AN AGENT FOR INHIBITING DEGRADATION OF THE POLYESTER BY ULTRA-VIOLET LIGHT SAID AGENT COMPRISING FROM ABOUT 10% TO ABOUT 90% RESORCINOL MONOBENZOATE AND FROM ABOUT 90% TO ABOUT 10% OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF 2,4-DIHYDROXYBENZOPHENONE, 2-HYDROXY-4-METHOXYBENZOPHENONE, 2,2''-DIHYDROXYBENZOPHENONE AND 4,4''DIHYDROXYBENZOPHENONE.
Claim 2
Dependent Claim
84 words
A COMPOSITION OF MATTER COMPRISING AN UNSATURATED POLYESTER OF A GLYCOL AND DICARBOXYLIC ACID AT LEAST A PART OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF MALEIC, FUMARIC AND ENDOMETHYLENE TETRAHYDROPHTHALIC ACIDS AND FROM ABOUT 0.01% TO ABOUT 10% OF AN AGENT FOR INHIBITING DEGRADATION OF THE POLYESTER BY ULTRA-VIOLET LIGHT SAID AGENT COMPRISING FROM ABOUT 10% TO ABOUT 90% RESORCINOL MONOBENZOATE AND FROM ABOUT 90% TO ABOUT 10% OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF 2,4-DIHYDROXYBENZOPHENONE, 2-HYDROXY-4-METHOXYBENZOPHENONE, 2,2''-DIHYDROXYBENZOPHENONE AND 4,4''DIHYDROXYBENZOPHENONE.
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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |