US3498950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of a polyester polymer
Assignee: Celanese Corp
•
Filing: 1964-04-24
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Granted: 1970-03-03
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Expires: 1984-04-24
Abstract
No abstract record available.
Inventors
- 👤 Malcolm H Shatz
- 👤 Raymond R Hindersinn
- 👤 William F Zimmer Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:08
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/40; C08G63/16; C08G63/18; C08G63/19; C08G63/193
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |