US3829359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper making machine having oncetwisted endless felts
Assignee: Nippon Felt Co Ltd
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Filing: 1971-06-28
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Granted: 1974-08-13
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Expires: 1991-06-28
Abstract
Abstract A paper making machine having mechanisms for once-twisting endless felts by about 180 degrees using two or more felt twist rolls within a region where the felts are free from contact with a processing paper sheet for an effective mitigation of accumulation of contaminative materials.
Inventors
- 👤 K Tsujibayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F9/00; D21F9/02
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |