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US1953022A
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Apparatus for bleaching pulp
Assignee: Niagara Alkali Co
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Filing: 1932-12-27
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Granted: 1934-03-27
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Expires: 1952-12-27
Abstract
No abstract record available.
Inventors
- 👤 Mathew F Mccombs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:18
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; B; B01; B01F; B01F27/00; B01F27/80; B01F27/91; B01F27/05; B01F27/11; B01F27/15
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) | 1937-03-26 | 1937-09-25 | 1938-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-03-26 | 1941-09-25 | 1942-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-03-26 | 1945-09-25 | 1946-03-27 | $7700.00 | Window Closed / Lapsed |