US2494131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen generating canister
Assignee: MSA Safety Inc
•
Filing: 1944-11-27
•
Granted: 1950-01-10
•
Expires: 1964-11-27
Abstract
No abstract record available.
Inventors
- 👤 Carey B Jackson
- 👤 Horace C Beahm
- 👤 Alfred C Van Andel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:54
CPC Classifications
A; A62; A62B; A62B21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
AN OXYGEN-LIBERATING CANISTER COMPRISING A METALLIC SHELL HAVING AN INNER LINING OF SHEET METAL OF HIGH HEAT CONDUCTIVITY NOT COMBUSTIBLE READILY IN PURE OXYGEN, AN ALKALI METAL PEROXIDE DISPOSED THEREIN, AN INLET CONDUIT POSITIONED IN
Claim 2
Dependent Claim
35 words
AN OXYGEN-LIBERATING CANISTER COMPRISING A METALLIC SHELL HAVING AN INNER LINING OF SHEET METAL OF HIGH HEAT CONDUCTIVITY NOT COMBUSTIBLE READILY IN PURE OXYGEN, AN ALKALI METAL PEROXIDE DISPOSED THEREIN, AN INLET CONDUIT POSITIONED IN
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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) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |