Patent US3819903A successfully refreshed from Google Patents.
Patent US3094306A successfully refreshed from Google Patents.
US3094306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic valve
Assignee: Individual
•
Filing: 1958-11-17
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Granted: 1963-06-18
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Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Martin B Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:22
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN AN UNLOADER VALVE ASSEMBLY INCLUDING A PAIR OF TELESCOPICALLY INTERCONNECTED TUBULAR BODIES, VALVE MEANS FOR SELECTIVELY CONFINING THE FLOW OF FLUID FROM ONE TUBULAR BODY INTO THE OTHER TUBULAR BODY WHEN CLOSED AND FOR PERMITTING FLOW BETWEEN THE INTERIOR OF ONE TUBULAR MEMBER AND THE EXTERIOR OF THE OTHER TUBULAR MEMBER WHEN OPEN UPON TELESCOPIC MOVEMENTS OF THE TUBULAR BODIES IN OPPOSITE DIRECTIONS, SAID VALVE MEANS INCLUDING A CYLINDRICAL SEAT ON ONE TUBULAR BODY, A RESILIENT SEALING ELEMENT CARRIED BY THE OTHER TUBULAR BODY, SAID SEALING ELEMENT HAVING A RADIALLY PROJECTING SECTION OF AN INITIAL RELAXED DIAMETER AND VOLUME SUCH THAT SAID RADIALLY
Claim 2
Dependent Claim
104 words
IN AN UNLOADER VALVE ASSEMBLY INCLUDING A PAIR OF TELESCOPICALLY INTERCONNECTED TUBULAR BODIES, VALVE MEANS FOR SELECTIVELY CONFINING THE FLOW OF FLUID FROM ONE TUBULAR BODY INTO THE OTHER TUBULAR BODY WHEN CLOSED AND FOR PERMITTING FLOW BETWEEN THE INTERIOR OF ONE TUBULAR MEMBER AND THE EXTERIOR OF THE OTHER TUBULAR MEMBER WHEN OPEN UPON TELESCOPIC MOVEMENTS OF THE TUBULAR BODIES IN OPPOSITE DIRECTIONS, SAID VALVE MEANS INCLUDING A CYLINDRICAL SEAT ON ONE TUBULAR BODY, A RESILIENT SEALING ELEMENT CARRIED BY THE OTHER TUBULAR BODY, SAID SEALING ELEMENT HAVING A RADIALLY PROJECTING SECTION OF AN INITIAL RELAXED DIAMETER AND VOLUME SUCH THAT SAID RADIALLY
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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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |