Patent US3898999A successfully refreshed from Google Patents.
US3616796A
Expired / Lapsed
US
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Humidified respiratory tube and method
Assignee: Individual
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Filing: 1969-06-30
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Granted: 1971-11-02
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Expires: 1989-06-30
Abstract
Abstract A SYSTEM FOR HUMIDIFYING AND DELIVERING GASES SUCH AS AIR OR OXYGEN TO A PATIENT FROM RESPIRATOR, ANESTHESIA MACHINE OR OXYGEN OUTLET. THE SYSTEM INCLUDES A COMPOSITE TUBE FORMED FROM AN INNER WATER PERMEABLE TUBE THROUGH WHICH THE GAS FLOWS AND AN OUTER TUBE WHICH SURROUNDS THE INNER TUBE TO DEFINE A JACKET ABOUT THE INNER TUBE. WARM WATER IS CAUSED TO FLOW THROUGH THE JACKET AND PERMEATES THE INNER TUBE SO THAT THE WATER IS EXPOSED AND ABSORBED BY THE AIR STREAM. THE OUTLET FROM THE INNER TUBNE IS DIRECTED TO THE PATIENT WHO RECEIVES THE HUMIDIFIED, CONDITION GAS.
Inventors
- 👤 Richard Robert Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:45
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/14; A61M16/16; A61M16/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |