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US2881675A
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Method and apparatus for de-watering aqueous pulp or stock in the manufacture or paper or board
Assignee: St Annes Board Mill Co Ltd
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Filing: 1955-03-10
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Granted: 1959-04-14
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Expires: 1975-03-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas Reginald James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:06
CPC Classifications
D; D21; D21F; D21F3/00; D21F1/00; D21F9/00; D21F9/003; D21G; D21G9/00
Claims Analysis
Total Claims: 0
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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 |