US3395338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prospecting system employing electromagnetic wave forms exhibiting abrupt changes
Assignee: Selco Exploration Co Ltd
•
Filing: 1965-06-08
•
Granted: 1968-07-30
•
Expires: 1985-06-08
Abstract
No abstract record available.
Inventors
- 👤 Barringer Anthony Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:41
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/10; G01V3/104
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2735980A
Cited
US2527559A
Cited
US2685058A
Cited
US2657380A
Cited
US3090910A
Cited
US3105934A
Cited
US3210652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |