US1541371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for bleaching pulp
Assignee: Stebbins Engineering and Manufacturing Co
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Filing: 1925-03-09
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Granted: 1925-06-09
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Expires: 1945-03-09
Abstract
No abstract record available.
Inventors
- 👤 Albert D Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:40
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; D21C9/1026; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/233; B01F23/2334; B01F23/23341; B01F27/00; B01F27/80; B01F27/92; B01F27/921; B01F27/9211
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) | 1928-06-08 | 1928-12-08 | 1929-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-06-08 | 1932-12-08 | 1933-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-06-08 | 1936-12-08 | 1937-06-09 | $7700.00 | Window Closed / Lapsed |