US3291380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure exchanger cell rings
Assignee: Power Jets Research and Development Ltd
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Filing: 1965-10-20
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Granted: 1966-12-13
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Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Brown James
- 👤 Costick James Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:23
CPC Classifications
F; F04; F04F; F04F13/00; F02; F02B; F02B33/00; F02B33/32; F02B33/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PRESSURE EXCHANGER CELL RING INCLUDING AN INNER MEMBER, AND OUTER MEMBER AND A PLURALITY OF CELL WALLS EXTENDING BETWEEN THE INNER AND OUTER MEMBERS, THE AXIALLY EXTENDING INNER AND OUTER EDGES OF THE CELL WALLS BEING SECURED TO THE INNER AND OUTER MEMBERS RESPECTIVELY AND THE FREE-ENDS OF THE CELL WALLS BEING UNSUPPORTED EXCEPT WHERE THEY ARE SECURED TO THE INNER AND OUTER MEMBERS, THE FREE-ENDS OF EACH CELL WALL BEING SHAPED IN SUCH MANNER THAT THE RIGIDITY OF EACH FREE-END IS INCREASED WITH RESPECT TO THE RIGIDITY OF THE CELL WALL AT A POSITION INTERMEDIATE THE FREE-ENDS.
Claim 2
Dependent Claim
99 words
A PRESSURE EXCHANGER CELL RING INCLUDING AN INNER MEMBER, AND OUTER MEMBER AND A PLURALITY OF CELL WALLS EXTENDING BETWEEN THE INNER AND OUTER MEMBERS, THE AXIALLY EXTENDING INNER AND OUTER EDGES OF THE CELL WALLS BEING SECURED TO THE INNER AND OUTER MEMBERS RESPECTIVELY AND THE FREE-ENDS OF THE CELL WALLS BEING UNSUPPORTED EXCEPT WHERE THEY ARE SECURED TO THE INNER AND OUTER MEMBERS, THE FREE-ENDS OF EACH CELL WALL BEING SHAPED IN SUCH MANNER THAT THE RIGIDITY OF EACH FREE-END IS INCREASED WITH RESPECT TO THE RIGIDITY OF THE CELL WALL AT A POSITION INTERMEDIATE THE FREE-ENDS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |