US3302392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device comprising at least one sealing element between two coaxially arranged elements which are movable with respect to each other
Assignee: US Philips Corp
•
Filing: 1965-05-27
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Granted: 1967-02-07
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Expires: 1985-05-27
Abstract
No abstract record available.
Inventors
- 👤 Herman Fokker
- 👤 Roelf Jan Meyer
- 👤 Gijsbert Prast
- 👤 Klaas Roozendaal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:57
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; E; E01; E01C; E01C11/00; E01C11/24; E01C11/26; E01C11/265; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/0535; F16; F16J; F16J3/00; F16J3/06; F02G2243/00; F02G2243/02; F02G2243/04; F02G2243/08; F02G2244/00; F02G2244/02; F02G2244/06; F02G2244/12; F02G2253/00; F02G2253/02; F02G2253/08; F02G2253/10; F02G2253/50; F02G2257/00; F02G2270/00; F02G2270/40; F02G2270/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A THERMODYNAMIC RECIPROCATING APPARATUS COMPRISING CYLINDER MEANS, A PISTON MEANS RECIPROCATING IN SAID CYLINDER MEANS WHEREBY PRESSURE FLUCTUATIONS OCCUR IN THE WORKING SPACE BOUNDED BY SAID PISTON AND CYLINDER MEANS, AT LEAST ONE ADDITIONAL SPACE COMMUNICATING WITH SAID MENT, SAID ADDITIONAL SPACE COMMUNICATING WITH SAID WORKING SPACE THROUGH SAID REGENERATING ELEMENT, SAID ADDITIONAL SPACE HAVING VOLUME VARIATIONS WITH A PHASE DIF-
Claim 2
Dependent Claim
61 words
A THERMODYNAMIC RECIPROCATING APPARATUS COMPRISING CYLINDER MEANS, A PISTON MEANS RECIPROCATING IN SAID CYLINDER MEANS WHEREBY PRESSURE FLUCTUATIONS OCCUR IN THE WORKING SPACE BOUNDED BY SAID PISTON AND CYLINDER MEANS, AT LEAST ONE ADDITIONAL SPACE COMMUNICATING WITH SAID MENT, SAID ADDITIONAL SPACE COMMUNICATING WITH SAID WORKING SPACE THROUGH SAID REGENERATING ELEMENT, SAID ADDITIONAL SPACE HAVING VOLUME VARIATIONS WITH A PHASE DIF-
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |