Patent US3192241A successfully refreshed from Google Patents.
US3192241A
Expired / Lapsed
US
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Transesterification reaction of orthosilicates with polyhydric phenols
Assignee: Monsanto Chemicals Ltd
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Filing: 1958-03-13
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Granted: 1965-06-29
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Expires: 1978-03-13
Abstract
No abstract record available.
Inventors
- 👤 Roebuck David Samuel Petrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:25
CPC Classifications
C; C08; C08G; C08G77/00; C07; C07F; C07F7/00; C07F7/02; C07F7/04; C07F7/06; C08G77/60; C09; C09K; C09K5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
THE PRODUCT OBTAINED BY HEATING A DIHYDROXYPHENOL WITH A MOLAR EXCESS OF TETRAPHENYL ORTHOSILICATE UNTIL THE REACTION IS SUBSTANTIALLY COMPLETE.
Claim 2
Dependent Claim
20 words
THE PRODUCT OBTAINED BY HEATING A DIHYDROXYPHENOL WITH A MOLAR EXCESS OF TETRAPHENYL ORTHOSILICATE UNTIL THE REACTION IS SUBSTANTIALLY COMPLETE.
References Cited (Backward Citations)
US2386793A
Cited
US2406671A
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US2630446A
Cited
US2724698A
Cited
US2755269A
Cited
FR1118776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |