US2627759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball roller counterweight
Assignee: LUFKIN FOUNDRY AND MACHINE Co
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Filing: 1950-08-25
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Granted: 1953-02-10
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Expires: 1970-08-25
Abstract
No abstract record available.
Inventors
- 👤 John L Fincher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:59
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/14; E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/126; E21B43/127; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2154; Y10T74/2156; Y10T74/2157
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |