US1172879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for administering oxygen to persons in a state of collapse by asphyxiation or other causes.
Assignee: Individual
•
Filing: 1915-01-13
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Granted: 1916-02-22
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Expires: 1935-01-13
Abstract
No abstract record available.
Inventors
- 👤 Robert Henry Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:00
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0057; A61M16/0072
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) | 1919-02-21 | 1919-08-23 | 1920-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-02-21 | 1923-08-23 | 1924-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-02-21 | 1927-08-23 | 1928-02-22 | $7700.00 | Window Closed / Lapsed |