US2662871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters made from dibasic acids derived from vanillin
Assignee: Rayonier Inc
•
Filing: 1950-11-28
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Granted: 1953-12-15
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Expires: 1970-11-28
Abstract
No abstract record available.
Inventors
- 👤 Louis H Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C07; C07C; C07C65/00; C07C65/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
LINEAR POLYESTERS OBTAINED BY THE CONDENSATION OF A DIHYDRIC ALCOHOL WITH THE DIBASIC ACIDS:
Claim 2
Dependent Claim
14 words
LINEAR POLYESTERS OBTAINED BY THE CONDENSATION OF A DIHYDRIC ALCOHOL WITH THE DIBASIC ACIDS:
References Cited (Backward Citations)
US2465150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |