Patent US2939107A successfully refreshed from Google Patents.
US1701543A
Expired / Lapsed
US
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Process of conditioning cellulose fiber for conversion into cellulose derivatives, and product of same
Assignee: Brown Co
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Filing: 1926-10-09
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Granted: 1929-02-12
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Expires: 1946-10-09
Abstract
No abstract record available.
Inventors
- 👤 George A Richter
- 👤 Milton O Schur
- 👤 Royal H Rasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:19
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/26
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) | 1932-02-12 | 1932-08-13 | 1933-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-02-12 | 1936-08-13 | 1937-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-02-12 | 1940-08-13 | 1941-02-12 | $7700.00 | Window Closed / Lapsed |