US3396724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathing apparatus with periodic volume change
Assignee: Individual
•
Filing: 1966-04-25
•
Granted: 1968-08-13
•
Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Freytag Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:09
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0057; A61M16/0081; A61M16/0075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A BREATHING APPARATUS COMPRISING A HOUSING, A BREATHING BAG IS SAID HOUSING, PRESSURE MEANS FOR PUTTING SAID BAG UNDER GREATER THAN OR LESS THAN ATMOSPHERIC PRESSURE TO EXPAND OR CONTRACT SAID BAG, FIRST TUBE MEANS JOINED TO SAID BAG FOR SUPPLYING AIR TO A PATIENT, SECOND TUBE MEANS JOINED TO SAID FIRST TUBE MEANS FOR REMOVING AIR EXHALED BY THE PATIENT, FIRST EXHAUST VALVE MEANS IN SAID SECOND TUBE MEANS IN NORMALLY OPENED POSITION FOR THE RELEASE OF EXHALED AIR, PRESSURE COUNTING MEANS ENGAGEABLE WITH SAID FIRST EXHAUST VALVE MEANS FOR CLOSING SAID FIRST EXHAUST VALVE MEANS AFTER A PREDETERMINED NUMBER OF GREATER THAN ATMOSPHERIC PRESSURES APPLIED TO SAID BAG, AND SECOND EXHAUST VALVE MEANS IN SAID SECOND TUBE MEANS HAVING A GREATER RESISTANCE TO OPENING THAN SAID FIRST EXHAUST VALVE MEANS FOR RELEASING A PORTION ONLY OF THE AIR BEING EXHALED BY THE PATIENT.
Claim 2
Dependent Claim
145 words
A BREATHING APPARATUS COMPRISING A HOUSING, A BREATHING BAG IS SAID HOUSING, PRESSURE MEANS FOR PUTTING SAID BAG UNDER GREATER THAN OR LESS THAN ATMOSPHERIC PRESSURE TO EXPAND OR CONTRACT SAID BAG, FIRST TUBE MEANS JOINED TO SAID BAG FOR SUPPLYING AIR TO A PATIENT, SECOND TUBE MEANS JOINED TO SAID FIRST TUBE MEANS FOR REMOVING AIR EXHALED BY THE PATIENT, FIRST EXHAUST VALVE MEANS IN SAID SECOND TUBE MEANS IN NORMALLY OPENED POSITION FOR THE RELEASE OF EXHALED AIR, PRESSURE COUNTING MEANS ENGAGEABLE WITH SAID FIRST EXHAUST VALVE MEANS FOR CLOSING SAID FIRST EXHAUST VALVE MEANS AFTER A PREDETERMINED NUMBER OF GREATER THAN ATMOSPHERIC PRESSURES APPLIED TO SAID BAG, AND SECOND EXHAUST VALVE MEANS IN SAID SECOND TUBE MEANS HAVING A GREATER RESISTANCE TO OPENING THAN SAID FIRST EXHAUST VALVE MEANS FOR RELEASING A PORTION ONLY OF THE AIR BEING EXHALED BY THE PATIENT.
References Cited (Backward Citations)
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US2969789A
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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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |