Patent US2344718A successfully refreshed from Google Patents.
US2344718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen mask
Assignee: Individual
•
Filing: 1940-04-08
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Granted: 1944-03-21
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Expires: 1960-04-08
Abstract
No abstract record available.
Inventors
- 👤 Silas A Morehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:12
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/02; A62B18/025
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) | 1947-03-21 | 1947-09-20 | 1948-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-21 | 1951-09-20 | 1952-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-21 | 1955-09-20 | 1956-03-21 | $7700.00 | Window Closed / Lapsed |