US2940787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically insulated sucker rod coupling
Assignee: Individual
•
Filing: 1958-08-25
•
Granted: 1960-06-14
•
Expires: 1978-08-25
Abstract
No abstract record available.
Inventors
- 👤 Ralph V Goodner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:36
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/02; F16L25/021; E; E21; E21B; E21B17/00; E21B17/02; E21B17/028; E21B17/0285; E21B17/04; E21B17/042; Y; Y10; Y10S; Y10S411/00; Y10S411/914; Y10S411/924; Y10S411/947; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885; Y10T403/00; Y10T403/29; Y10T403/297
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US138277A
Cited
US1497952A
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US1619728A
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US1559874A
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US1859311A
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US2049289A
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US2161568A
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US2286829A
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US2437843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |