US2358387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acidyl derivatives of cellulose and other organic substances
Assignee: Celanese Corp
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Filing: 1940-07-08
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Granted: 1944-09-19
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Expires: 1960-07-08
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Henry
- 👤 Moncrieff Robert Wighton
- 👤 Bates Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:40
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/14; C08B; C08B3/00; C08B3/12; C08B3/16; D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/192
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-09-19 | 1948-03-20 | 1948-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-09-19 | 1952-03-20 | 1952-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-09-19 | 1956-03-20 | 1956-09-19 | $7700.00 | Window Closed / Lapsed |