Patent US4473141A successfully refreshed from Google Patents.
Patent US2396716A successfully refreshed from Google Patents.
US2396716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen and air controlling apparatus for aviators
Assignee: Avox Systems Inc
•
Filing: 1943-08-28
•
Granted: 1946-03-19
•
Expires: 1963-08-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Phillip E Meidenbauer
- 👤 Howard A Benzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:53
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/12; A62B9/00; A62B9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/7722; Y10T137/7781; Y10T137/7832; Y10T137/7837; Y10T137/7897
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1949-03-18 | 1949-09-17 | 1950-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-18 | 1953-09-17 | 1954-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-18 | 1957-09-17 | 1958-03-19 | $7700.00 | Window Closed / Lapsed |