US3118468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient material check valve
Assignee: General Electric Co
•
Filing: 1961-04-20
•
Granted: 1964-01-21
•
Expires: 1981-04-20
Abstract
No abstract record available.
Inventors
- 👤 Bochan John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:55
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A UNITARY CHECK VALVE FORMED OF A RUBBER-LIKE MATERIAL, SAID VALVE HAVING AN ANNULAR BASE PORTION AND A HOLLOW PORTION, SAID HOLLOW PORTION HAVING AN INLET END CONNECTED TO SAID BASE PORTION AND AN OUTLET END SPACED FROM SAID BASE PORTION ON ONE SIDE THEREOF, SAID HOLLOW PORTION HAVING AT LEAST PARTS THEREOF TAPERING INWARDLY FROM SAIDN INLET END TO SAID LUTLET END, SAID OUTLET END
Claim 2
Dependent Claim
66 words
A UNITARY CHECK VALVE FORMED OF A RUBBER-LIKE MATERIAL, SAID VALVE HAVING AN ANNULAR BASE PORTION AND A HOLLOW PORTION, SAID HOLLOW PORTION HAVING AN INLET END CONNECTED TO SAID BASE PORTION AND AN OUTLET END SPACED FROM SAID BASE PORTION ON ONE SIDE THEREOF, SAID HOLLOW PORTION HAVING AT LEAST PARTS THEREOF TAPERING INWARDLY FROM SAIDN INLET END TO SAID LUTLET END, SAID OUTLET END
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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) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |