US2889210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen producing canister for breathing apparatus
Assignee: MSA Research Corp
•
Filing: 1957-11-05
•
Granted: 1959-06-02
•
Expires: 1977-11-05
Abstract
No abstract record available.
Inventors
- 👤 Robert M Bovard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:08
CPC Classifications
A; A62; A62B; A62B21/00; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
AN OXYGEN PRODUCING CANISTER COMPRISING A HOUSING PROVIDED WITH AN INLET FOR EXHALED AIR AN OUTLET FOR OXYGEN TO BE INHALED, TWO CHAMBERS IN SAID HOUSING ADAPTED TO CONTAIN OXYGEN GENERATING CHEMICAL THAT BECOMES HOT AS IT REACTS WITH MOISTURE IN SAID EXHALED AIR, EACH CHAMBER HAVING AN INLET AND AN OUTLET COMMUNICATING WITH THE INSIDE OF THE HOUSING, A VALVE IN THE HOUSING, LOW MELTING POINT MATERIAL NORMALLY HOLDING THE VALVE IN A POSITION TO COMPEL EXHALE AIR TO FLOW THROUGH A PREDETERMINED ONE OF SAID CHAMBERS, AND A SPRING FOR MOVING TH E VALVE WHEN SAID MATERIAL IS MELTED BY HEAT PRODUCED
Claim 2
Dependent Claim
104 words
AN OXYGEN PRODUCING CANISTER COMPRISING A HOUSING PROVIDED WITH AN INLET FOR EXHALED AIR AN OUTLET FOR OXYGEN TO BE INHALED, TWO CHAMBERS IN SAID HOUSING ADAPTED TO CONTAIN OXYGEN GENERATING CHEMICAL THAT BECOMES HOT AS IT REACTS WITH MOISTURE IN SAID EXHALED AIR, EACH CHAMBER HAVING AN INLET AND AN OUTLET COMMUNICATING WITH THE INSIDE OF THE HOUSING, A VALVE IN THE HOUSING, LOW MELTING POINT MATERIAL NORMALLY HOLDING THE VALVE IN A POSITION TO COMPEL EXHALE AIR TO FLOW THROUGH A PREDETERMINED ONE OF SAID CHAMBERS, AND A SPRING FOR MOVING TH E VALVE WHEN SAID MATERIAL IS MELTED BY HEAT PRODUCED
References Cited (Backward Citations)
US1414194A
Cited
US2181961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |