Patent US2793543A successfully refreshed from Google Patents.
US2793543A
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US
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Eccentric wrist pin mounting for pumping units
Assignee: Parkersburg Rig and Reel Co
•
Filing: 1952-11-12
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Granted: 1957-05-28
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Expires: 1972-11-12
Abstract
No abstract record available.
Inventors
- 👤 Mater Robert Griffin De La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:17
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/04; F16C3/22; F16C3/28; F04; F04B; F04B9/00; F04B9/02; F16C11/00; F16C11/02; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2154; Y10T74/2156; Y10T74/2157; Y10T74/2173; Y10T74/2179
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE135238C
Cited
US96643A
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US811426A
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DE389122C
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US1979675A
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US2270843A
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US2408200A
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US2576765A
Cited
US2618172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |