US2339913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose treatment process
Assignee: EIDP Inc
•
Filing: 1942-02-27
•
Granted: 1944-01-25
•
Expires: 1962-02-27
Abstract
No abstract record available.
Inventors
- 👤 William E Hanford
- 👤 Donald F Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:25
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/395; C; C08; C08B; C08B15/00; C08B15/05; C08B15/06
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) | 1947-01-24 | 1947-07-26 | 1948-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-01-24 | 1951-07-26 | 1952-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-01-24 | 1955-07-26 | 1956-01-25 | $7700.00 | Window Closed / Lapsed |