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US3471441A
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US
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Polyesters of diacid halide bisphenol and aliphatic modifier
Assignee: Celanese Corp
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Filing: 1968-07-01
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Granted: 1969-10-07
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Expires: 1988-07-01
Abstract
No abstract record available.
Inventors
- 👤 Raymond R Hindersinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:36
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199; C08G63/19; C08G63/193; C08G63/195; C08G63/40; C08G63/66; C08G63/668; C08G63/676; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; C08G63/78; C08G63/82; C08G63/87
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2973339A
Cited
FR1198715A
Cited
US3161615A
Cited
US2950266A
Cited
US2989501A
Cited
GB897640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |