Patent US2399054A successfully refreshed from Google Patents.
US2399054A
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US
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Breathing apparatus
Assignee: Avox Systems Inc
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Filing: 1942-11-19
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Granted: 1946-04-23
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Expires: 1962-11-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Phillip E Meidenbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:20
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/02; A62B7/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7794; Y10T137/7822; Y10T137/7823; Y10T137/7826; Y10T137/7827
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) | 1949-04-22 | 1949-10-22 | 1950-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-22 | 1953-10-22 | 1954-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-22 | 1957-10-22 | 1958-04-23 | $7700.00 | Window Closed / Lapsed |