Patent US3536028A successfully refreshed from Google Patents.
US3536028A
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US
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Warning device for cylinders for liquified gas under pressure
Assignee: Individual
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Filing: 1967-11-06
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Granted: 1970-10-27
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Expires: 1987-11-06
Abstract
Abstract A warning device for a cylinder of liquefied gas under pressure for indicating to the operator when the level of gas in the cylinder is getting low, having a sleeve supported in the interior of the cylinder by a coupling connected to the tap of the cylinder and through which gas flows from the cylinder and which is closed off when the liquid falls below a predetermined level so that the consequent drop in pressure in the chamber sets a valve member into oscillation establishing a warning signal.
Inventors
- 👤 Marie Francoise Adaglio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:21
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/30; F16K1/304; F16K1/305; F16K1/307; F16K37/00; F17; F17C; F17C13/00; F17C13/02; F17C13/021; G; G01; G01F; G01F23/00; G01F23/0007; G01F23/0015; G01F23/30; G01F23/56; G01F23/58; G05; G05D; G05D9/00; G05D9/02; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0335; F17C2205/0388; F17C2205/0394; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/03; F17C2223/033; F17C2250/00; F17C2250/03; F17C2250/036; F17C2250/04; F17C2250/0404; F17C2250/0408; F17C2250/0421; F17C2250/07; F17C2250/072; F17C2250/077
Claims Analysis
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References Cited (Backward Citations)
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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) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |