US2466290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of digesting pulp by the alkaline process
Assignee: Lawrence University
•
Filing: 1944-03-15
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Granted: 1949-04-05
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Expires: 1964-03-15
Abstract
No abstract record available.
Inventors
- 👤 Sidney D Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:22
CPC Classifications
D; D21; D21C; D21C3/00; D21C3/22; D21C3/228
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1870982A
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US1450023A
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US1684645A
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AU2327529A
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US1922262A
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US2078222A
Cited
US2176471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-04 | 1952-10-04 | 1953-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-04 | 1956-10-04 | 1957-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-04 | 1960-10-04 | 1961-04-05 | $7700.00 | Window Closed / Lapsed |