Patent US2934589A successfully refreshed from Google Patents.
US2934589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical lead-through
Assignee: Well Surveys Inc
•
Filing: 1957-02-06
•
Granted: 1960-04-26
•
Expires: 1977-02-06
Abstract
No abstract record available.
Inventors
- 👤 George E Sykora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:38
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/12; G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2589338A
Cited
US1128819A
Cited
US2353620A
Cited
FR895547A
Cited
US2471437A
Cited
US2543963A
Cited
US2552686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |