Patent US2748799A successfully refreshed from Google Patents.
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 20:36
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
References Cited (Backward Citations)
US509992A
Cited
US984151A
Cited
US1591726A
Cited
US1524054A
Cited
GB305111A
Cited
US2057834A
Cited
US2409071A
Cited
US2600977A
Cited
US2644485A
Cited
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 |