Patent US3846231A successfully refreshed from Google Patents.
US3846231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determination of the magnitude of total specific energy absorbed by a sample of pulp stock
Assignee: Westvaco Corp
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Filing: 1972-07-25
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Granted: 1974-11-05
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Expires: 1992-07-25
Abstract
Abstract 1. An apparatus for the determination of the magnitude of refining energy absorbed by a sample of pulp stock, said apparatus comprising: (A) stock sample chamber means separated from a stock reservoir by a perforated partition means adapted to pass the water vehicle of said stock but substantially obstruct passage of the stock fiber; (B) chamber pressure control means for regulation of pressure within said chamber relative to the pressures of said stock reservoir to selectively admit and expel said water vehicle; (C) at least two liquid level sensing means positionally separated within said chamber to delineate a prescribed volume therebetween;
Inventors
- 👤 W Crosby
- 👤 H Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:39
CPC Classifications
D; D21; D21G; D21G9/00; D21G9/0009; D21G9/0018; D21D; D21D1/00; D21D1/002; D21F; D21F1/00; D21F1/0009; Y; Y10; Y10S; Y10S162/00; Y10S162/09; Y10S162/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
An apparatus for the determination of the magnitude of refining energy absorbed by a sample of pulp stock, said apparatus comprising: (A) stock sample chamber means separated from a stock reservoir by a perforated partition means adapted to pass the water vehicle of said stock but substantially obstruct passage of the stock fiber; (B) chamber pressure control means for regulation of pressure within said chamber relative to the pressures of said stock reservoir to selectively admit and expel said water vehicle; (C) at least two liquid level sensing means positionally separated within said chamber to delineate a prescribed volume therebetween;
Claim 2
Independent Claim
100 words
An apparatus for the determination of the magnitude of refining energy absorbed by a sample of pulp stock, said apparatus comprising: (A) stock sample chamber means separated from a stock reservoir by a perforated partition means adapted to pass the water vehicle of said stock but substantially obstruct passage of the stock fiber; (B) chamber pressure control means for regulation of pressure within said chamber relative to the pressures of said stock reservoir to selectively admit and expel said water vehicle; (C) at least two liquid level sensing means positionally separated within said chamber to delineate a prescribed volume therebetween;
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |