US3214728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for detecting wakes of objects moving in a body of water by measuring differences in the electrical impedance of water at spaced regions thereof
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1960-03-11
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Granted: 1965-10-26
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Expires: 1980-03-11
Abstract
No abstract record available.
Inventors
- 👤 Larry L Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:38
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/02; G01V11/00; Y; Y02; Y02A; Y02A90/00; Y02A90/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A SYSTEM FOR DETECTING WAKES OF SUBMERGED MOVING OBJECTS IN THE OCEAN INCLUDING THE COMBINATION OF A SUPPORT LINE EXTENDING THROUGH A GIVEN REGION, MEANS FOR MOVING THE LINE, AND A NUMBER OF DETECTORS AT SPACED LOCATIONS ALONG THE LINE, EACH OF THE DETECTORS INCLUDING MEANS FOR MEASURING THE DIFFERENCE IN THE ELECTRICAL IMPEDANCE OF WATER SIMULTANEOUSLY AT TWO DIFFERENT REGIONS THEREOF THAT ARE SPACED APART BY A DISTANCE SMALLER THAN THE SPACING BETWEEN SAID DETECTORS.
Claim 2
Independent Claim
76 words
A SYSTEM FOR DETECTING WAKES OF SUBMERGED MOVING OBJECTS IN THE OCEAN INCLUDING THE COMBINATION OF A SUPPORT LINE EXTENDING THROUGH A GIVEN REGION, MEANS FOR MOVING THE LINE, AND A NUMBER OF DETECTORS AT SPACED LOCATIONS ALONG THE LINE, EACH OF THE DETECTORS INCLUDING MEANS FOR MEASURING THE DIFFERENCE IN THE ELECTRICAL IMPEDANCE OF WATER SIMULTANEOUSLY AT TWO DIFFERENT REGIONS THEREOF THAT ARE SPACED APART BY A DISTANCE SMALLER THAN THE SPACING BETWEEN SAID DETECTORS.
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |