US3178678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depth ahead adapter for sonar systems
Assignee: Individual
•
Filing: 1961-06-22
•
Granted: 1965-04-13
•
Expires: 1981-06-22
Abstract
No abstract record available.
Inventors
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:26
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/87; Y; Y10; Y10S; Y10S367/00; Y10S367/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN COMBINATION; A MARINE DEPTH INDICATOR MEANS FOR INDICATING A SINGLE DISTANCE, A DUAL TRANSDUCER COMPRISING A FIRST AND SECOND TRANSDUCER FOR GENERATING A FIRST AND SECOND PRESSURE WAVE IN A FIRST AND SECOND DIRECTION RESPECTIVELY, AND AN ADAPTER MEANS FOR COUPLING SAID DUAL TRANSDUCER TO SAID MARINE DEPTH INDICATOR; SAID ADAPTER MEANS INCLUDING SWITCH MEANS FOR SELECTIVELY CONNECTING EITHER SAID FIRST OR SECOND TRANSDUCER TO SAID DEPTH INDICATOR MEANS; FIRST, SECOND AND THIRD ENCLOSED AND INDEPENDENT
Claim 2
Dependent Claim
77 words
IN COMBINATION; A MARINE DEPTH INDICATOR MEANS FOR INDICATING A SINGLE DISTANCE, A DUAL TRANSDUCER COMPRISING A FIRST AND SECOND TRANSDUCER FOR GENERATING A FIRST AND SECOND PRESSURE WAVE IN A FIRST AND SECOND DIRECTION RESPECTIVELY, AND AN ADAPTER MEANS FOR COUPLING SAID DUAL TRANSDUCER TO SAID MARINE DEPTH INDICATOR; SAID ADAPTER MEANS INCLUDING SWITCH MEANS FOR SELECTIVELY CONNECTING EITHER SAID FIRST OR SECOND TRANSDUCER TO SAID DEPTH INDICATOR MEANS; FIRST, SECOND AND THIRD ENCLOSED AND INDEPENDENT
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |