Patent US3808401A successfully refreshed from Google Patents.
Patent US1690954A successfully refreshed from Google Patents.
US1690954A
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US
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Process for the extraction of cellulose or paper pulp from fibrous vegetable matter containing the same
Assignee: Individual
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Filing: 1928-02-10
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Granted: 1928-11-06
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Expires: 1948-02-10
Abstract
No abstract record available.
Inventors
- 👤 Spencer Edmondson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:08
CPC Classifications
G; G01; G01G; G01G19/00; G01G19/14; G01G19/16; D; D21; D21C; D21C3/00; D21C3/22; D21C7/00
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) | 1931-11-06 | 1932-05-07 | 1932-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-11-06 | 1936-05-07 | 1936-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-11-06 | 1940-05-07 | 1940-11-06 | $7700.00 | Window Closed / Lapsed |