Patent US3392384A successfully refreshed from Google Patents.
US3392384A
Expired / Lapsed
US
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Detection process and apparatus
Assignee: Eltro GmbH and Co
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Filing: 1960-10-21
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Granted: 1968-07-09
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Expires: 1980-10-21
Abstract
No abstract record available.
Inventors
- 👤 Wesch Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:33
CPC Classifications
G; G01; G01V; G01V8/00; G01V8/005; G01V3/00; G01V3/12; H; H01; H01Q; H01Q3/00; H01Q3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
APPARATUS FOR DETECTING AN OBJECT HAVING A FIRST DIELECTRIC CONSTANT LOCATED IN A BODY HAVING A SECOND DIELECTRIC CONSTANT AND INCLUDING A SURFACE PORTION; SAID APPARATUS COMPRISING A TRANSMITTING ANTENNA SYSTEM DISPLACEABLE OVER THE SURFACE PORTION OF SAID BODY AND ADAPTED TO RADIATE OVER SAID BODY ELECTROMAGNETIC MICROWAVES REFLECTABLE BY DIELECTRIC MEDIA, SPACED RECEIVING SYSTEMS OPERATIVELY ASSOCIATED WITH SAID TRANSMITTING SYSTEM AND DISPLACEABLE WITH THE SAME TO RECEIVE REFLECTED MICROWAVES FOR DETECTING SAID OBJECT, AND MEANS COUPLED TO SAID RECEIVING SYSTEMS FOR COMPARING THE REFLECTED MICROWAVES RECEIVED BY SAID RECEIVING SYSTEMS WHEREBY THE MICROWAVES REFLECTED BY SAID SURFACE PORTION, BEING SUBSTANTIALLY EQUAL, ARE CANCELLED OUT AND THE MICROWAVES
Claim 2
Dependent Claim
108 words
APPARATUS FOR DETECTING AN OBJECT HAVING A FIRST DIELECTRIC CONSTANT LOCATED IN A BODY HAVING A SECOND DIELECTRIC CONSTANT AND INCLUDING A SURFACE PORTION; SAID APPARATUS COMPRISING A TRANSMITTING ANTENNA SYSTEM DISPLACEABLE OVER THE SURFACE PORTION OF SAID BODY AND ADAPTED TO RADIATE OVER SAID BODY ELECTROMAGNETIC MICROWAVES REFLECTABLE BY DIELECTRIC MEDIA, SPACED RECEIVING SYSTEMS OPERATIVELY ASSOCIATED WITH SAID TRANSMITTING SYSTEM AND DISPLACEABLE WITH THE SAME TO RECEIVE REFLECTED MICROWAVES FOR DETECTING SAID OBJECT, AND MEANS COUPLED TO SAID RECEIVING SYSTEMS FOR COMPARING THE REFLECTED MICROWAVES RECEIVED BY SAID RECEIVING SYSTEMS WHEREBY THE MICROWAVES REFLECTED BY SAID SURFACE PORTION, BEING SUBSTANTIALLY EQUAL, ARE CANCELLED OUT AND THE MICROWAVES
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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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |