US2690934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated sucker rod and tubing to prevent electrolysis and corrosion
Assignee: Individual
•
Filing: 1950-08-28
•
Granted: 1954-10-05
•
Expires: 1970-08-28
Abstract
No abstract record available.
Inventors
- 👤 Samuel M Holcombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; E21B17/00; E21B17/003; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5746
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1576767A
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US1804078A
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US1814183A
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US2063863A
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US2096359A
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US2181361A
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US2178931A
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US2166116A
Cited
US2175770A
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US2337711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |