US3775525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damp pulp molding
Assignee: Individual
•
Filing: 1972-07-19
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Granted: 1973-11-27
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Expires: 1992-07-19
Abstract
Abstract Damp, fibrous pulp such as cellulose fiber pulp of 20 % to 40 % solid material is molded by being worked repeatedly with a tool that moves fibers relative to each other for straightening out the fibers and removing air from the pulp to form a damp, felted pump which is then dried. Preferably the tool is a rotor having skid comb teeth that run repeatedly through the pulp in sled runner fashion and work the pulp into a former that is moved progressively away from the rotor to form a length of damp, felted pulp.
Inventors
- 👤 E Cumpston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:04
CPC Classifications
D; D21; D21F; D21F9/00; D21F9/02; D21G; D21G9/00
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |