Patent US2000716A successfully refreshed from Google Patents.
US2000716A
Expired / Lapsed
US
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Insulated electrical connection
Assignee: Geophysical Service Inc
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Filing: 1934-04-07
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Granted: 1935-05-07
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Expires: 1954-04-07
Abstract
No abstract record available.
Inventors
- 👤 James V Polk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:17
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/028; E21B17/0285
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) | 1938-05-06 | 1938-11-05 | 1939-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-06 | 1942-11-05 | 1943-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-06 | 1946-11-05 | 1947-05-07 | $7700.00 | Window Closed / Lapsed |