US2881670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for de-watering stock on a fourdrinier type paper or board-making machine
Assignee: St Annes Board Mill Co Ltd
•
Filing: 1955-07-13
•
Granted: 1959-04-14
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Expires: 1975-07-13
Abstract
No abstract record available.
Inventors
- 👤 Thomas Reginald James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:55
CPC Classifications
D; D21; D21F; D21F9/00; D21F9/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1143931A
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US1181542A
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US1500208A
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US1483562A
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US1549338A
Cited
US1722503A
Cited
US1843656A
Cited
GB505140A
Cited
US2694345A
Cited
US2730933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |