Patent US3208978A successfully refreshed from Google Patents.
US3208978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tin derivatives of polyesters
Assignee: Monsanto Co
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Filing: 1961-11-16
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Granted: 1965-09-28
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Expires: 1981-11-16
Abstract
No abstract record available.
Inventors
- 👤 Weissenberger Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:22
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/91; C08G63/914; C08G63/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN OLEFINICALLY UNSATURATED POLYESTER WHICH IS THE REACTION PRODUCT OF A DIHYDRIC ALCOHOL AND A DIBASIC ACID AND TO WHICH HAS BEEN ADDED TO AT LEAST ONE DOUBLE BOND RRNSNH4-N WHEREIN R IS A HYDROCARBON RADICAL HAVING NOT MORE THAN 8 CARBON ATOMS AND N IS AN INTEGER FROM 2 TO 3.
Claim 2
Dependent Claim
52 words
AN OLEFINICALLY UNSATURATED POLYESTER WHICH IS THE REACTION PRODUCT OF A DIHYDRIC ALCOHOL AND A DIBASIC ACID AND TO WHICH HAS BEEN ADDED TO AT LEAST ONE DOUBLE BOND RRNSNH4-N WHEREIN R IS A HYDROCARBON RADICAL HAVING NOT MORE THAN 8 CARBON ATOMS AND N IS AN INTEGER FROM 2 TO 3.
References Cited (Backward Citations)
US2715111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |