US3325644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching type radiometer having variable duty cycle
Assignee: Collins Radio Co
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Filing: 1963-11-29
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Granted: 1967-06-13
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Eugene O Frye
- 👤 David M Hodgin
- 👤 Robert D Tollefson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:55
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A RADIOMETER RECEIVER OF THE SWITCHING TYPE, SAID RADIOMETER RECEIVER COMPRISING: ANTENNA MEANS; A REFERENCE LOAD; DETECTOR MEANS; FIRST SWITCHING MEANS FOR ALTERNATELY CONNECTING SAID DETECTING MEANS WITH SAID ANTENNA MEANS AND SAID REFERENCE LOAD; A REFERENCE STORAGE UNIT; SECOND SWITCHING MEANS FOR CONNECTING THE OUTPUT OF SAID DETECTOR MEANS WITH SAID REFERENCE STORAGE UNIT; SWITCH CONTROL MEANS FOR CONTROLLING SAID FIRST AND SECOND SWITCHING MEANS WHEREBY THE OUTPUT OF SAID DETECTOR MEANS IS CONNECTED TO SAID REFERENCE STORAGE UNIT ONLY WHEN SAID DETECTOR MEANS IS ALSO CONNECTED WITH SAID REFERENCE LOAD; AND COMPARATOR MEANS FOR RECEIVING THE OUTPUT FROM SAID DETECTOR MEANS AND THE OUTPUT FROM SAID REFERENCE STORAGE UNIT AND AUTOMATICALLY CANCELLING THE BACKGROUND NOISE LEVEL ORIGINATING IN SAID RECEIVER.
Claim 2
Dependent Claim
122 words
A RADIOMETER RECEIVER OF THE SWITCHING TYPE, SAID RADIOMETER RECEIVER COMPRISING: ANTENNA MEANS; A REFERENCE LOAD; DETECTOR MEANS; FIRST SWITCHING MEANS FOR ALTERNATELY CONNECTING SAID DETECTING MEANS WITH SAID ANTENNA MEANS AND SAID REFERENCE LOAD; A REFERENCE STORAGE UNIT; SECOND SWITCHING MEANS FOR CONNECTING THE OUTPUT OF SAID DETECTOR MEANS WITH SAID REFERENCE STORAGE UNIT; SWITCH CONTROL MEANS FOR CONTROLLING SAID FIRST AND SECOND SWITCHING MEANS WHEREBY THE OUTPUT OF SAID DETECTOR MEANS IS CONNECTED TO SAID REFERENCE STORAGE UNIT ONLY WHEN SAID DETECTOR MEANS IS ALSO CONNECTED WITH SAID REFERENCE LOAD; AND COMPARATOR MEANS FOR RECEIVING THE OUTPUT FROM SAID DETECTOR MEANS AND THE OUTPUT FROM SAID REFERENCE STORAGE UNIT AND AUTOMATICALLY CANCELLING THE BACKGROUND NOISE LEVEL ORIGINATING IN SAID RECEIVER.
References Cited (Backward Citations)
US3167714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |