US2523642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous pulp digester
Assignee: Cellulose Development Corp Ltd
•
Filing: 1944-01-12
•
Granted: 1950-09-26
•
Expires: 1964-01-12
Abstract
No abstract record available.
Inventors
- 👤 Becker Frederick George Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:49
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; D; D21; D21C; D21C7/00; D21C7/08; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00121; B01J2219/00162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |