Patent US3213693A successfully refreshed from Google Patents.
US3213693A
Expired / Lapsed
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Radio frequency inertial orientation system
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1959-08-19
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Granted: 1965-10-26
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Expires: 1979-08-19
Abstract
No abstract record available.
Inventors
- 👤 Milton U Clauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:13
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A DIRECTION INDICATING SYSTEM INCLUDING SUPERCONDUCTIVE MEANS OF THE TYPE ADAPTED TO SUSTAIN THE PROPAGATION OF ELECTROMAGNETIC ENERGY THEREIN AND INCLUDING A MEMBER DEFINING A CAVITY AND CONSTRUCTED ESSENTIALLY OF SUPERCONDUCTIVE MATERIAL; AND ELECTROMAGNETIC ENERGY INJECTION AND DETECTION MEANS ASSOCIATED WITH SAID CAVITY AND COMPRISING SWITCHING MEANS POSITIONED ADJACENT TO A SURFACE PORTION OF SAID MEMBER FOR TRANSFORMING SAID SURFACE PORTION FROM A SUPERCONDUCTIVE TO A RESISTIVE STATE FOR TRANSMISSION OF ELECTROMAGNETIC ENERGY INTO AND OUT OF SAID CAVITY; SAID SURFACE PORTION BEING CONSTRUCTED OF A SUPERCONDUCTIVE MATERIAL HAVING A LOWER CRITICAL SUPER-
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) | 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 |