Patent US3238274A successfully refreshed from Google Patents.
US3238274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for curing unsaturated polyesters using a vanadium compound and an acid phosphate ester as catalysts
Assignee: Distillers Co Yeast Ltd
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Filing: 1961-02-15
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Granted: 1966-03-01
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Expires: 1981-02-15
Abstract
No abstract record available.
Inventors
- 👤 Allan Leslie Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:02
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR THE CURE OF A COMPOSITION CONTAINING AN UNSATURATED POLYESTER MIXED WITH A CROSS LINKING MONOMER WHICH COMPRISES MIXING SAID COMPOSITION WITH A CATALYST SYSTEM WHICH INCLUDES A PEROXIDE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC PEROXIDES AND HYDROPEROXIDES AND A SOLUTION OF A VANADIUM COMPOUND IN A LIQUID ACID PHOSPHATE ESTER OF THE FORMULA:
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE CURE OF A COMPOSITION CONTAINING AN UNSATURATED POLYESTER MIXED WITH A CROSS LINKING MONOMER WHICH COMPRISES MIXING SAID COMPOSITION WITH A CATALYST SYSTEM WHICH INCLUDES A PEROXIDE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC PEROXIDES AND HYDROPEROXIDES AND A SOLUTION OF A VANADIUM COMPOUND IN A LIQUID ACID PHOSPHATE ESTER OF THE FORMULA:
References Cited (Backward Citations)
US2409774A
Cited
US2456824A
Cited
US2795549A
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US2865865A
Cited
US2801233A
Cited
US2963447A
Cited
US3003991A
Cited
DE1070819B
Cited
US3022277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |