Patent US2739879A successfully refreshed from Google Patents.
US2739879A
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Pressure reactor
Assignee: Acordis UK Ltd
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Filing: 1951-11-28
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Granted: 1956-03-27
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Expires: 1971-11-28
Abstract
No abstract record available.
Inventors
- 👤 Bates Harold
- 👤 Fisher James Wotherspoon
- 👤 Upton Edward James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:12
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/185; C; C08; C08B; C08B17/00; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
APPARATUS FOR THE TREATMENT OF A FLOWABLE MATERIAL, SAID APPARATUS COMPRISING A PPURALITY OF CYLINDERS COMMUNICATING WITH ONE ANOTHER END TO END IN SERIES, THE CYLINDER AT ONE END OF SAID SERIES HAVING AN INLET PASSAGE FOR SAID SERIES AND THE CYLINDER AT OTHER END OF SAID SERIES HAVING AN EXIT PASSAGE FOR SAID SERIES, NON-RETURN VALVE MEANS TO PREVENT FLOW OF MATERIAL THROUGH SAID SERIES FROM THE OUTLET TO THE INLET END THEREOF, A PISTON IN EACH CYLINDER FORMED WITH A PASSAGE THROUGH THICKNESS OF SAID PISTON, AND A COMMON PISTON ROD ON WHICH ALL SAID PISTONS ARE MOUNTED, THE LENGTHS OF SAID CYLINDERS EXCLUSIVE OF THE THICKNESS OF THE RESPECTIVE PISTONS THEREIN BEING SUBSTANTIALLY EQUAL.
Claim 2
Dependent Claim
117 words
APPARATUS FOR THE TREATMENT OF A FLOWABLE MATERIAL, SAID APPARATUS COMPRISING A PPURALITY OF CYLINDERS COMMUNICATING WITH ONE ANOTHER END TO END IN SERIES, THE CYLINDER AT ONE END OF SAID SERIES HAVING AN INLET PASSAGE FOR SAID SERIES AND THE CYLINDER AT OTHER END OF SAID SERIES HAVING AN EXIT PASSAGE FOR SAID SERIES, NON-RETURN VALVE MEANS TO PREVENT FLOW OF MATERIAL THROUGH SAID SERIES FROM THE OUTLET TO THE INLET END THEREOF, A PISTON IN EACH CYLINDER FORMED WITH A PASSAGE THROUGH THICKNESS OF SAID PISTON, AND A COMMON PISTON ROD ON WHICH ALL SAID PISTONS ARE MOUNTED, THE LENGTHS OF SAID CYLINDERS EXCLUSIVE OF THE THICKNESS OF THE RESPECTIVE PISTONS THEREIN BEING SUBSTANTIALLY EQUAL.
References Cited (Backward Citations)
AT12297B
Cited
US960045A
Cited
US1408092A
Cited
US2491618A
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US2498773A
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US2470191A
Cited
US2520424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |