Patent US3221737A successfully refreshed from Google Patents.
US3221737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for vaporization of volatile anesthetic liquids
Assignee: Individual
•
Filing: 1962-07-25
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Granted: 1965-12-07
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Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 James A Felts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:05
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/14; A61M16/18; A61M16/147
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
IN COMBINATION, A BREATHING CIRCUIT AND A METERING DEVICE FOR LIQUID ANESTHETICS, SAID METERING DEVICE HAVING A PRESSURE CHAMBER PARTIALLY FILLED WITH A LIQUID ANESTHETIC, MEANS FOR SUPPLYING GAS AT A CONSTANT RATE OF FLOW TO SAID PRESSURE CHAMBER, MEANS FOR REGUALTING THE PRESSURE IN SAID CHAMBER INCLUDING A GAS DUCT WITH AN ADJUSTABLE OBSTRUCTION THEREIN PASSING FROM SAID PRESSURE CHAMBER TO SAID BREATHING CIRCUIT, A FLUID PASSAGE LEADING FROM A PORTION OF SAID PRESSURE CHAMBER SUBMERGED BY LIQUID ANESTHETIC TO SAID BREATHING CIRCUIT.
References Cited (Backward Citations)
GB190306312A
Cited
US1738757A
Cited
US2141794A
Cited
US2243435A
Cited
GB519203A
Cited
US3021840A
Cited
US3018777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |