US3375702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak detection method
Assignee: Geothermal Surveys Inc
•
Filing: 1965-06-07
•
Granted: 1968-04-02
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Expires: 1985-06-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Birman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:08
CPC Classifications
E; E02; E02D; E02D1/00; E02D1/08; G; G01; G01M; G01M3/00; G01M3/002; G01V; G01V9/00; G01V9/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2403704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |