US1870980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing cellulose acetate
Assignee: EIDP Inc
•
Filing: 1927-05-05
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Granted: 1932-08-09
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Expires: 1947-05-05
Abstract
No abstract record available.
Inventors
- 👤 Altwegg Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:30
CPC Classifications
C; C08; C08B; C08B17/00; C08B17/02; B; B01; B01F; B01F27/00; B01F27/80; B01F27/90; B01F27/902; B01F27/9021; B01J; B01J19/00; B01J19/0053; B01J19/0066; B01F27/05; B01F27/11; B01F27/19; B01F27/192
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) | 1935-08-09 | 1936-02-08 | 1936-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-09 | 1940-02-08 | 1940-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-09 | 1944-02-08 | 1944-08-09 | $7700.00 | Window Closed / Lapsed |