US3247965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical centrifugal screen for pulp stock
Assignee: Kimberly Clark Corp
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Filing: 1963-05-07
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Granted: 1966-04-26
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Expires: 1983-05-07
Abstract
No abstract record available.
Inventors
- 👤 Ralph V Braun
- 👤 Byron R Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:25
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A VERTICAL CENTRIFUGAL PULP SCREENING APPARATUS COMPRISING: (A) A BASE, (B) A CLOSED CYLINDRICAL CASING SUPPORTED ON SAID BASE, (E) A CYLINDRICAL SCREEN MOUNTED FOR CONCENTRIC ROTATION WITHIN SAID CASING, SAID SCREEN HAVING PERFORATED WALLS, AN OPEN TOP WITH AN OUTWARDLY EXTENDING PERIPHERAL FLANGE AND A CLOSED IMPERFORATE BOTTOM PEAKED IN THE CENTER AND CURVED UPWARDLY AT THE PERIPHERY TO JOIN THE PERFORATED CYLINDRICAL WALLS OF THE SCREEN, THE INTERIOR OF SAID SCREEN BEING FREE OF SCRAPING DEVICES, (D) A STATIONARY ANNULAR DOUBLE-WALLED MANIFOLD CONCENTRIC WITH SAID SCREEN AFFIXED TO THE ROOF OF SAID CASING AND EXTENDING DOWNWARDLY TO A POINT SHORT OF THE BOTTOM OF SAID SCREEN, THE INNER WALL OF SAID MANIFOLD FORMING A CONDUIT FOR DIRECTING A PULP SUSPENSION DOWNWARDLY AGAINST THE FLOOR OF SAID SCREEN AND UPWARDLY AGAINST AND THROUGH THE PERFORATED WALLS OF SAID SCREEN,
Claim 2
Dependent Claim
140 words
A VERTICAL CENTRIFUGAL PULP SCREENING APPARATUS COMPRISING: (A) A BASE, (B) A CLOSED CYLINDRICAL CASING SUPPORTED ON SAID BASE, (E) A CYLINDRICAL SCREEN MOUNTED FOR CONCENTRIC ROTATION WITHIN SAID CASING, SAID SCREEN HAVING PERFORATED WALLS, AN OPEN TOP WITH AN OUTWARDLY EXTENDING PERIPHERAL FLANGE AND A CLOSED IMPERFORATE BOTTOM PEAKED IN THE CENTER AND CURVED UPWARDLY AT THE PERIPHERY TO JOIN THE PERFORATED CYLINDRICAL WALLS OF THE SCREEN, THE INTERIOR OF SAID SCREEN BEING FREE OF SCRAPING DEVICES, (D) A STATIONARY ANNULAR DOUBLE-WALLED MANIFOLD CONCENTRIC WITH SAID SCREEN AFFIXED TO THE ROOF OF SAID CASING AND EXTENDING DOWNWARDLY TO A POINT SHORT OF THE BOTTOM OF SAID SCREEN, THE INNER WALL OF SAID MANIFOLD FORMING A CONDUIT FOR DIRECTING A PULP SUSPENSION DOWNWARDLY AGAINST THE FLOOR OF SAID SCREEN AND UPWARDLY AGAINST AND THROUGH THE PERFORATED WALLS OF SAID SCREEN,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |