Patent US1811795A successfully refreshed from Google Patents.
Patent US1529919A successfully refreshed from Google Patents.
US1529919A
Expired / Lapsed
US
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Pulp-bleaching method and apparatus
Assignee: Stebbins Engineering and Manufacturing Co
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Filing: 1922-03-06
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Granted: 1925-03-17
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Expires: 1942-03-06
Abstract
No abstract record available.
Inventors
- 👤 August F Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:11
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; B; B01; B01F; B01F25/00; B01F25/50
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) | 1928-03-16 | 1928-09-15 | 1929-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-03-16 | 1932-09-15 | 1933-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-03-16 | 1936-09-15 | 1937-03-17 | $7700.00 | Window Closed / Lapsed |