US3575472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for collecting woodpulp fibers as a uniform layer
Assignee: Johnson and Johnson
•
Filing: 1969-03-28
•
Granted: 1971-04-20
•
Expires: 1989-03-28
Abstract
Abstract Apparatus for collecting woodpulp fibers as a uniform layer of loose fibrous material. The fibers are collected on a surface while removing the air from said fibers without disrupting the flow of said fibers or their formation on the collecting means.
Inventors
- 👤 Charles A Brewster
- 👤 Charles H Plummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:46
CPC Classifications
D; D21; D21H; D21H11/00; D21C; D21C9/00; D21C9/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
Apparatus according to claim 1 wherein the distance over which the cross-sectional area of the transition piece increases is less than 8 inches.
Claim 2
Dependent Claim
67 words
Apparatus according to claim 1 wherein the leading edge of the transition piece is diverged from about 35* to 55* towards the direction of movement of the surface and the trailing edge is diverged from about 15* to 25* away from the direction of the movement of the surface and the distance over which the cross-sectional area of the transition piece increases is less than 8 inches.
References Cited (Backward Citations)
US491013A
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US1599371A
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US2110280A
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US2450511A
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US2676363A
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US2676364A
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US2711381A
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US3239889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |