US2373111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the detection and removal of gas or gases
Assignee: Individual
•
Filing: 1937-02-13
•
Granted: 1945-04-10
•
Expires: 1957-02-13
Abstract
No abstract record available.
Inventors
- 👤 Oliver T Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:52
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/4162; Y; Y10; Y10T; Y10T436/00; Y10T436/16; Y10T436/163333; Y10T436/18; Y10T436/182; Y10T436/19; Y10T436/196666; Y10T436/20; Y10T436/204998; Y10T436/205831
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) | 1948-04-09 | 1948-10-09 | 1949-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-09 | 1952-10-09 | 1953-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-09 | 1956-10-09 | 1957-04-10 | $7700.00 | Window Closed / Lapsed |