Patent US2268268A successfully refreshed from Google Patents.
Patent US3446207A successfully refreshed from Google Patents.
US3446207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycling system for respirator
Assignee: Individual
•
Filing: 1966-12-22
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Granted: 1969-05-27
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Expires: 1986-12-22
Abstract
No abstract record available.
Inventors
- 👤 Robert Metivier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:34
CPC Classifications
F; F15; F15C; F15C3/00; A; A61; A61M; A61M16/00; A62; A62B; A62B7/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
GENERATOR OF PERIODIC FLUID SIGNALS APPLIED TO A UTILIZING DEVICE, NOTABLY A RESPIRATORY MASK, WHICH COMPRISES A SOURCE OF FLUID UNDER PRESSURE, FIRST, SECOND, THIRD, FOURTH AND FIFTH PNEUMATICALLY CONTROLLED VALVES HAVING EACH AN INLET, AN OUTLET AND A CONTROL INLET, EACH VALVE BEING CLOSED OR OPEN ACCORDING AS A FLUID SIGNAL IS RESPECTIVELY APPLIED OR NOT TO THE CONTROL INLET OF THE VALVE, THE INLET, OUTLET AND CONTROL INLET OF SAID FIRST VALVE BEING CONNECTED RESPECTIVELY TO SAID SOURCE OF FLUID UNDER PRESSURE, TO SAID UTILIZING DEVICE AND TO THE OUTLET OF SAID SECOND VALVE, THE INLET OF SAID SECOND VALVE BEING CONNECTED TO THE SOURCE OF FLUID UNDER PRESSURE AND THE CONTROL INLET OF SAID SECOND VALVE BEING CONNECTED TO THE OUT-
Claim 2
Dependent Claim
124 words
GENERATOR OF PERIODIC FLUID SIGNALS APPLIED TO A UTILIZING DEVICE, NOTABLY A RESPIRATORY MASK, WHICH COMPRISES A SOURCE OF FLUID UNDER PRESSURE, FIRST, SECOND, THIRD, FOURTH AND FIFTH PNEUMATICALLY CONTROLLED VALVES HAVING EACH AN INLET, AN OUTLET AND A CONTROL INLET, EACH VALVE BEING CLOSED OR OPEN ACCORDING AS A FLUID SIGNAL IS RESPECTIVELY APPLIED OR NOT TO THE CONTROL INLET OF THE VALVE, THE INLET, OUTLET AND CONTROL INLET OF SAID FIRST VALVE BEING CONNECTED RESPECTIVELY TO SAID SOURCE OF FLUID UNDER PRESSURE, TO SAID UTILIZING DEVICE AND TO THE OUTLET OF SAID SECOND VALVE, THE INLET OF SAID SECOND VALVE BEING CONNECTED TO THE SOURCE OF FLUID UNDER PRESSURE AND THE CONTROL INLET OF SAID SECOND VALVE BEING CONNECTED TO THE OUT-
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) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |