US1551908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling apparatus for delivering oxygen
Assignee: PATENTS HOLDING Corp
•
Filing: 1919-04-09
•
Granted: 1925-09-01
•
Expires: 1939-04-09
Abstract
No abstract record available.
Inventors
- 👤 Theodore C Prouty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:15
CPC Classifications
A; A62; A62B; A62B9/00; A62B9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012; Y10T137/8158; Y10T137/8225; Y10T137/8326; Y10T137/8593; Y10T137/86187; Y10T137/86228
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) | 1928-08-31 | 1929-03-02 | 1929-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-08-31 | 1933-03-02 | 1933-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-08-31 | 1937-03-02 | 1937-09-01 | $7700.00 | Window Closed / Lapsed |