Patent US3292501A successfully refreshed from Google Patents.
US3292501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device including at least one cylinder with a piston-shaped body which is movable therein
Assignee: US Philips Corp
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Filing: 1964-12-04
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Granted: 1966-12-20
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Expires: 1984-12-04
Abstract
No abstract record available.
Inventors
- 👤 Verbeek Hendrik Jozef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:20
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F16; F16J; F16J1/00; F16J1/005; F16J1/006; F25B9/002; F25B9/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A DEVICE INCLUDING A CYLINDER HAVING A PISTON RECIPROCATING THEREIN TO VARY THE VOLUME OF A MEDIUM IN THE WORKING SPACE IN SAID CYLINDER COMPRISING A SEAL BETWEEN SAID PISTON AND CYLINDER, AND A GAP LOCATED BETWEEN SAID PISTON AND CYLINDER WHICH COMMUNICATES AT ONE SIDE WITH SAID WORKING SPACE IN SAID BOUNDED AT AN OPPOSITE SIDE BY SAID SEAL, SAID GAP BEING SUBSTANTIALLY CONICAL IN SHAPE WITH THE WIDER PART OF SAID GAP BEING ADJACENT TO SAID SEAL.
Claim 2
Independent Claim
79 words
A DEVICE INCLUDING A CYLINDER HAVING A PISTON RECIPROCATING THEREIN TO VARY THE VOLUME OF A MEDIUM IN THE WORKING SPACE IN SAID CYLINDER COMPRISING A SEAL BETWEEN SAID PISTON AND CYLINDER, AND A GAP LOCATED BETWEEN SAID PISTON AND CYLINDER WHICH COMMUNICATES AT ONE SIDE WITH SAID WORKING SPACE IN SAID BOUNDED AT AN OPPOSITE SIDE BY SAID SEAL, SAID GAP BEING SUBSTANTIALLY CONICAL IN SHAPE WITH THE WIDER PART OF SAID GAP BEING ADJACENT TO SAID SEAL.
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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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |