US2482858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose purification
Assignee: Celanese Corp
•
Filing: 1947-08-13
•
Granted: 1949-09-27
•
Expires: 1967-08-13
Abstract
No abstract record available.
Inventors
- 👤 Mervin E Martin
- 👤 Umansky Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:26
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/08; D21C9/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1283114A
Cited
US2098111A
Cited
US2070893A
Cited
US2228127A
Cited
US2226356A
Cited
US2408849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-26 | 1953-03-28 | 1953-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-26 | 1957-03-28 | 1957-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-26 | 1961-03-28 | 1961-09-27 | $7700.00 | Window Closed / Lapsed |