Patent US3276214A successfully refreshed from Google Patents.
US3276214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic liquid level control devices
Assignee: Union Carbide Corp
•
Filing: 1965-02-05
•
Granted: 1966-10-04
•
Expires: 1985-02-05
Abstract
No abstract record available.
Inventors
- 👤 Stanley L Wilson
- 👤 Carlos C Rodriguez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:11
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/02; F17C13/021; G; G01; G01F; G01F23/00; G01F23/14; G01F23/18; G01F23/185; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0329; F17C2205/0332; F17C2221/00; F17C2221/01; F17C2221/014; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2250/00; F17C2250/06; F17C2250/0605; F17C2250/061; F17C2265/00; F17C2265/01; F17C2265/015; F17C2265/017; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/731
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A CRYOGENIC LIQUID LEVEL CONTROL DEVICE COMPRISING IN COMBINATION: A LIQUID SUPPLY CONDUIT PROVIDED WITH A SHUT-OFF VALVE FOR DELIVERING A CRYOGENIC LIQUID TO A CONTAINER, A GAS-PRESSURE RESPONSIVE BELLOWS, MEANS CONNECTING SAID BELLOWS DIRECTLY TO SAID VALVE, A GAS-FILLED PROBE IN GAS COMMUNICATION WITH SAID BELLOWS, AND MEANS SEALING GAS WITHIN SAID PROBE AND ADJACENT SAID BELLOWS, ONE END OF SAID PROBE BEING LOCATED ADJACENT THE DESIRED LIQUID LEVEL FOR CHANGING THE PRESSURE OF SUCH GAS TO OPERATE SAID BELLOWS AND, IN TURN, CLOSE SAID VALVE IN RESPONSE TO CONDENSATION OF SUCH GAS WHEN THE LEVEL OF SUCH CRYOGENIC LIQUID REACHES SUCH END OF SAID PROBE AND CHANGES THE TEMPERATURE OF THE GAS THEREIN TO PRODUCE CONDENSATION.
Claim 2
Dependent Claim
118 words
A CRYOGENIC LIQUID LEVEL CONTROL DEVICE COMPRISING IN COMBINATION: A LIQUID SUPPLY CONDUIT PROVIDED WITH A SHUT-OFF VALVE FOR DELIVERING A CRYOGENIC LIQUID TO A CONTAINER, A GAS-PRESSURE RESPONSIVE BELLOWS, MEANS CONNECTING SAID BELLOWS DIRECTLY TO SAID VALVE, A GAS-FILLED PROBE IN GAS COMMUNICATION WITH SAID BELLOWS, AND MEANS SEALING GAS WITHIN SAID PROBE AND ADJACENT SAID BELLOWS, ONE END OF SAID PROBE BEING LOCATED ADJACENT THE DESIRED LIQUID LEVEL FOR CHANGING THE PRESSURE OF SUCH GAS TO OPERATE SAID BELLOWS AND, IN TURN, CLOSE SAID VALVE IN RESPONSE TO CONDENSATION OF SUCH GAS WHEN THE LEVEL OF SUCH CRYOGENIC LIQUID REACHES SUCH END OF SAID PROBE AND CHANGES THE TEMPERATURE OF THE GAS THEREIN TO PRODUCE CONDENSATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |