Patent US1473543A successfully refreshed from Google Patents.
Patent US3290684A successfully refreshed from Google Patents.
US3290684A
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Directional receiving systems
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1960-10-03
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Granted: 1966-12-06
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Expires: 1980-10-03
Abstract
No abstract record available.
Inventors
- 👤 Charles W Renn
- 👤 La Var H Barker
- 👤 Arnost A Horak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:32
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/2605; H01Q3/2611; H01Q3/2629; G; G01; G01S; G01S3/00; G01S3/02; G01S3/04; G01S3/06; G01S3/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN COMBINATION: A FIRST RECEIVING MEANS FOR RECEIVING A FIRST ALTERNATING CURRENT SIGNAL; A SECOND RECEIVING MEANS FOR RECEIVING A SECOND ALTERNATING CURRENT SIGNAL; SUBTRACTER MEANS CONNECTED TO SAID FIRST AND SECOND RECEIVING MEANS FOR DEVELOPING A REMAINDER SIGNAL SUBSTANTIALLY REPRESENTING THE ALTERNATING CURRENT DIFFERENCE BETWEEN SAID FIRST AND SECOND SIGNALS; SIGNAL COMPARATOR MEANS CONNECTED TO SAID SUBTRACTER MEANS AND AT LEAST ONE OF SAID RECEIVING MEANS FOR DEVELOPING AN OUTPUT SIGNAL SUBSTANTIALLY REPRESENTING THE TIME-AVERAGED PRODUCT OF SIGNALS APPLIED TO SAID COMPARATOR MEANS; AND MEANS CONNECTED TO SAID SIGNAL COMPARATOR MEANS FOR UTILIZING SAID OUTPUT SIGNAL.
Claim 2
Dependent Claim
97 words
IN COMBINATION: A FIRST RECEIVING MEANS FOR RECEIVING A FIRST ALTERNATING CURRENT SIGNAL; A SECOND RECEIVING MEANS FOR RECEIVING A SECOND ALTERNATING CURRENT SIGNAL; SUBTRACTER MEANS CONNECTED TO SAID FIRST AND SECOND RECEIVING MEANS FOR DEVELOPING A REMAINDER SIGNAL SUBSTANTIALLY REPRESENTING THE ALTERNATING CURRENT DIFFERENCE BETWEEN SAID FIRST AND SECOND SIGNALS; SIGNAL COMPARATOR MEANS CONNECTED TO SAID SUBTRACTER MEANS AND AT LEAST ONE OF SAID RECEIVING MEANS FOR DEVELOPING AN OUTPUT SIGNAL SUBSTANTIALLY REPRESENTING THE TIME-AVERAGED PRODUCT OF SIGNALS APPLIED TO SAID COMPARATOR MEANS; AND MEANS CONNECTED TO SAID SIGNAL COMPARATOR MEANS FOR UTILIZING SAID OUTPUT SIGNAL.
References Cited (Backward Citations)
US2825900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |