US2073243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel system testing instrument
Assignee: Doherty Research Co
•
Filing: 1935-07-03
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Granted: 1937-03-09
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Expires: 1955-07-03
Abstract
No abstract record available.
Inventors
- 👤 George J Liddell
- 👤 Roscoe C Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:46
CPC Classifications
G; G01; G01F; G01F9/00; G01F9/006; F; F02; F02M; F02M19/00; F02M19/01
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) | 1940-03-08 | 1940-09-07 | 1941-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-08 | 1944-09-07 | 1945-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-08 | 1948-09-07 | 1949-03-09 | $7700.00 | Window Closed / Lapsed |