US3566867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitary disposable circle absorption canister assembly
Assignee: Dryden Corp
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Filing: 1967-11-17
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Granted: 1971-03-02
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Expires: 1987-11-17
Abstract
Abstract A circle absorption system for anesthesia including a gas machine, a carbon dioxide absorbing canister assembly with corrugated inner wall surface, a gas supply hose thereto, rebreathing hoses and a mask connected thereto, an absorbing medium therein, and one-way valves mounted therein, the canister assembly with absorbing medium and valves being disposable.
Inventors
- 👤 Gale E Dryden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:44
CPC Classifications
A; A62; A62B; A62B19/00; A61; A61M; A61M16/00; A61M16/08; A61M16/0816; A61M16/0833; A61M16/10; A61M16/104; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
151 words
In a circle absorption system, the combination comprising: a disposable case having first, second, and third chambers therein; an inlet fitting in said case communicating with said first chamber; an outlet fitting in said case communicating with said third chamber; said first chamber communicating with said third chamber through said second chamber; an absorbent material for carbon dioxide, disposed in said second chamber; a plurality of additional fittings in said case communicating with said chambers; flow direction control valves in said inlet and outlet fittings; said second chamber being cylindrical; the cylindrical surface of said case which faces said second chamber being uneven around the circumference thereof, with said material in close contact therewith and encouraging uniform flow of gas up through said material, across the diameTer of said second chamber; and said surface having a vertically extending series of circular grooves therein and a circular flange extending radially inward therefrom.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |