Patent US222970A successfully refreshed from Google Patents.
US975178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pulp-screen.
Assignee: Individual
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Filing: —
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Granted: 1910-11-08
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Expires: 1927-11-08
Abstract
No abstract record available.
Inventors
- 👤 Charles Walter Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:46
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/02; B04B3/00; B04B9/00; B04B9/08; D; D21; D21D; D21D5/00; D21D5/02; D21D5/06
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) | 1913-11-07 | 1914-05-09 | 1914-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-11-07 | 1918-05-09 | 1918-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-11-07 | 1922-05-09 | 1922-11-08 | $7700.00 | Window Closed / Lapsed |