US2497968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making a polyester
Assignee: Standard Oil Development Co
•
Filing: 1945-04-06
•
Granted: 1950-02-21
•
Expires: 1965-04-06
Abstract
No abstract record available.
Inventors
- 👤 David W Young
- 👤 Julius P Rocca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:29
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C08G63/78; C08G63/82; C08G63/83; C10M2209/00; C10M2209/10; C10M2209/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2360393A
Cited
US2397602A
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US2373015A
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US2360394A
Cited
US2342113A
Cited
US2416433A
Cited
US2375516A
Cited
US2429219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |