Patent US3732142A successfully refreshed from Google Patents.
US3732142A
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US
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Insert for paper machine drainage elements
Assignee: Jwi Ltd
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Filing: 1971-02-25
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Granted: 1973-05-08
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Expires: 1991-02-25
Abstract
Abstract A replaceable drainage element having a wear resistant insert composed of a plurality of discrete elements arranged in end-to-end relationship and clamped in this relationship by a clamping member applying clamping pressure to the elements.
Inventors
- 👤 O Beacom
- 👤 D Macbean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:45
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/483
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |