US3273066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting changes in the atmospheric electric field
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1963-12-20
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Granted: 1966-09-13
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Expires: 1983-12-20
Abstract
No abstract record available.
Inventors
- 👤 Lothar H Ruhnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:55
CPC Classifications
G; G01; G01W; G01W1/00; G01W1/08; G01W1/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
AN APPARATUS FOR SENSING ELECTROSTATIC CONDITIONS IN THE ATMOSPHERE COMPRISING: A RADIOSONDE APPARATUS INCLUDING MEANS FOR MODULATING THE OUTPUT FREQUENCY THEREOF, SAID MEANS INCLUDING AN R-C CIRCUIT; A PAIR OF PROBES POSITIONED IN RESPECTIVELY DIFFERENT LOCATIONS IN THE ATMOSPHERE WITH RESPECT TO SAID RADIOSONDE; A FIELD EFFECT TRANSISTOR HAVING ITS DRAIN AND GATE TERMINALS CONNECTED ACROSS SAID PAIR OF PROBES AND HAVING ITS SOURCE AND DRAIN TERMINALS CONNECTED IN SERIES WITH THE RESISTANCE OF SAID R-C CIRCUIT TO MODULATE SAID RADIOSONDE; AND
Claim 2
Independent Claim
82 words
AN APPARATUS FOR SENSING ELECTROSTATIC CONDITIONS IN THE ATMOSPHERE COMPRISING: A RADIOSONDE APPARATUS INCLUDING MEANS FOR MODULATING THE OUTPUT FREQUENCY THEREOF, SAID MEANS INCLUDING AN R-C CIRCUIT; A PAIR OF PROBES POSITIONED IN RESPECTIVELY DIFFERENT LOCATIONS IN THE ATMOSPHERE WITH RESPECT TO SAID RADIOSONDE; A FIELD EFFECT TRANSISTOR HAVING ITS DRAIN AND GATE TERMINALS CONNECTED ACROSS SAID PAIR OF PROBES AND HAVING ITS SOURCE AND DRAIN TERMINALS CONNECTED IN SERIES WITH THE RESISTANCE OF SAID R-C CIRCUIT TO MODULATE SAID RADIOSONDE; AND
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |