US1744186A
Expired / Lapsed
US
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Valve mechanism for measuring pumps
Assignee: American Oil Co
•
Filing: 1928-09-17
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Granted: 1930-01-21
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Expires: 1948-09-17
Abstract
No abstract record available.
Inventors
- 👤 Arthur T Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:56
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/02; G01F11/04; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/615; Y10T137/6154; Y10T137/6851; Y10T137/6966; Y10T137/6991; Y10T137/6995; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7917; Y10T137/7919
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) | 1933-01-20 | 1933-07-22 | 1934-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-01-20 | 1937-07-22 | 1938-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-01-20 | 1941-07-22 | 1942-01-21 | $7700.00 | Window Closed / Lapsed |