Patent US3304730A successfully refreshed from Google Patents.
US3304730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device to aid pumping of volatile gases
Assignee: Individual
•
Filing: 1965-06-09
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Granted: 1967-02-21
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Expires: 1985-06-09
Abstract
No abstract record available.
Inventors
- 👤 Robert B Gorham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:07
CPC Classifications
F; F17; F17C; F17C7/00; F17C7/02; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/05; F17C2201/054; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2227/00; F17C2227/01; F17C2227/0128; F17C2227/0135; F17C2250/00; F17C2250/06; F17C2250/0605; F17C2250/0636; F17C2270/00; F17C2270/01; F17C2270/0165; F17C2270/0168; F17C2270/0171
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
APPARATUS TO PROVIDE A PRESSURE HEAD TO AID IN PUMPING LIQUID GAS FROM BULK TANKS INCLUDING: (A) PUMP MEANS ARRANGED TO RECEIVE LIQUID GAS FROM SAID TANK AND DELIVER THE SAME; (B) LIQUID GAS VAPORIZER MEANS FOR CONVERTING LIQUID GAS TO VAPOR; (C) CONDUIT MEANS EXTENDING FROM SAID TANK DISCHARGE TO SAID VAPORIZER MEANS DELIVERING LIQUID THERETO; (D) PRESSURE RESPONSIVE VALVE MEANS CONTROLLING THE FLOW OF LIQUID FLUID TO SAID VAPORIZER; (E) A VAPOR CONDUIT RECEIVING VAPOR FROM SAID VAPORIZER AND DISCHARGING THE SAME INTO THE BULK TANK TO CREATE A PRESSURE HEAD ABOVE THE LIQUID LEVEL THEREIN; AND (F) CONDUIT MEANS COMMUNICATING WITH THE VAPOR IN THE BULK TANK AND SAID PRESSURE RESPONSIVE VALVE MEANS TO PERMIT LIQUID TO FLOW THROUGH SAID VALVE MEANS ONLY UPON REACHING A PREDETERMINED DISCHARGE PRESSURE FROM SAID BULK TANK.
Claim 2
Dependent Claim
136 words
APPARATUS TO PROVIDE A PRESSURE HEAD TO AID IN PUMPING LIQUID GAS FROM BULK TANKS INCLUDING: (A) PUMP MEANS ARRANGED TO RECEIVE LIQUID GAS FROM SAID TANK AND DELIVER THE SAME; (B) LIQUID GAS VAPORIZER MEANS FOR CONVERTING LIQUID GAS TO VAPOR; (C) CONDUIT MEANS EXTENDING FROM SAID TANK DISCHARGE TO SAID VAPORIZER MEANS DELIVERING LIQUID THERETO; (D) PRESSURE RESPONSIVE VALVE MEANS CONTROLLING THE FLOW OF LIQUID FLUID TO SAID VAPORIZER; (E) A VAPOR CONDUIT RECEIVING VAPOR FROM SAID VAPORIZER AND DISCHARGING THE SAME INTO THE BULK TANK TO CREATE A PRESSURE HEAD ABOVE THE LIQUID LEVEL THEREIN; AND (F) CONDUIT MEANS COMMUNICATING WITH THE VAPOR IN THE BULK TANK AND SAID PRESSURE RESPONSIVE VALVE MEANS TO PERMIT LIQUID TO FLOW THROUGH SAID VALVE MEANS ONLY UPON REACHING A PREDETERMINED DISCHARGE PRESSURE FROM SAID BULK TANK.
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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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |