US2748799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneously-operated liquid and gas vent valves
Assignee: Standard Oil Co
•
Filing: 1952-11-15
•
Granted: 1956-06-05
•
Expires: 1972-11-15
Abstract
No abstract record available.
Inventors
- 👤 Michael B Rath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:18
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/54; B65D88/544; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86292; Y10T137/86324
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
IN A TANK, THE COMBINATION OF A CONNECTION AND AN INWARDLY UNSEATING VALVE FOR LIQUID AT THE BOTTOM, A STEM EXTENDING FROM SAID VALVE, A DIAPHRAGM UNDER SAID STEM, AN OUTWARDLY UNSEATING COMBINED VENT VALVE AND SAFETY VALVE FOR GAS AT THE TOP OF THE TANK, A STEM EXTENDING FROM SUCH COMBINED VALVE, A DIAPHRAGM ON WHICH THE LOWER END OTH COMBINED VALVE STEM NORMALLY RESTS, THE COMBINED VALVE BEING MOVABLE OUTWARDLY INDEPENDENTLY OF ITS DIAPHRAGM IN RESPONSE TO EXCESSIVE PRESSURE WITHIN
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Cited
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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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |