Patent US1534145A successfully refreshed from Google Patents.
US1534145A
Expired / Lapsed
US
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Treatment of pulps
Assignee: Dorr Co
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Filing: 1921-12-22
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Granted: 1925-04-21
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Expires: 1941-12-22
Abstract
No abstract record available.
Inventors
- 👤 Stedman William Armor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:17
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/10; B01D21/12; B01D21/14; B01D21/003; B01D21/0036; B01D21/0039; B01D21/0042; B01D21/18; B01D21/186; B01D21/24; B01D21/2405; B01D21/2427; B01D21/245; B01D21/2488
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) | 1928-04-20 | 1928-10-20 | 1929-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-04-20 | 1932-10-20 | 1933-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-04-20 | 1936-10-20 | 1937-04-21 | $7700.00 | Window Closed / Lapsed |