Patent US2388129A successfully refreshed from Google Patents.
Patent US2123374A successfully refreshed from Google Patents.
US2123374A
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Apparatus for varying the stroke of pump rods and the like
Assignee: Individual
•
Filing: 1937-09-13
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Granted: 1938-07-12
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Expires: 1957-09-13
Abstract
No abstract record available.
Inventors
- 👤 Mcgauchie Ernest Fran Naismith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:52
CPC Classifications
F; F03; F03D; F03D9/00; F03D9/20; F03D9/28; F03D15/00; F03D15/10; F03D9/10; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y02E70/00; Y02E70/30; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18992; Y10T74/21; Y10T74/2142; Y10T74/2151
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) | 1941-07-11 | 1942-01-10 | 1942-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-07-11 | 1946-01-10 | 1946-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-07-11 | 1950-01-10 | 1950-07-12 | $7700.00 | Window Closed / Lapsed |