US3329929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for underwater detection and system therefor
Assignee: Individual
•
Filing: 1965-05-07
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Granted: 1967-07-04
•
Expires: 1985-05-07
Abstract
No abstract record available.
Inventors
- 👤 Henry J Burnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:52
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/02; G01V3/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
56 words
THE METHOD DETECTING A FOREIGN BODY ENTERING AN AREA IN WATER, SAID METHOD CONSISTING OF SUPPLYING A FLOW OF ELECTRICAL CURRENT THROUGH THE WATER IN SAID AREA, RECEIVING CURRENT THROUGH A RECEIVING MEANS LOCATED IN THE PATH OF SAID FLOW OF CURRENT, ADJUSTING SAID RECEIVING MEANS TO OBTAIN AN ELECTRICAL BALANCE BETWEEN THE CURRENT AT OP-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |