Patent US3149691A successfully refreshed from Google Patents.
US3149691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automobile guidance and speed control systems
Assignee: Individual
•
Filing: 1961-08-04
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Granted: 1964-09-22
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Expires: 1981-08-04
Abstract
No abstract record available.
Inventors
- 👤 Fred M Snell
- 👤 Robert A Spangler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:40
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/021; G05D1/0259; G05D1/0263
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
APPARATUS FOR AUTOMATICALLY CONTROLLING A VEHICLE TRAVELING ALONG A HIGHWAY, THE APPARATUS INCLUDING HIGHWAY ASSOCIATED MEANS COMPRISING A NETWORK FOR DIVIDING THE HIGHWAY INTO A SERIES OF SIMILAR CONDUCTIVE LOOPS, AN EXCITER COIL AND A PICKUP COIL DISPOSED IN FIXED RELATION ON THE VEHICLE, AN OSCILLATOR CONNECTED TO SAID EXCITER COIL WHEREBY THE PICKUP COIL RECEIVES, FROM SAID LOOPS, A SIGNAL OF VARYING AMPLITUDE AS THE EXCITER COIL PASSES FROM A POSITION OF VERTICAL REGISTRY OVER A GIVEN LOOP INTO A POSITION OF VERTICAL REGISTRY OVER A SUCEEDING LOOP, PULSE GENERATING MEANS CONNECTED TO SAID PICKUP COIL FOR GENERATING A SIGNAL WHOSE PULSE FREQUENCY IS PROPORTIONAL
Claim 2
Dependent Claim
106 words
APPARATUS FOR AUTOMATICALLY CONTROLLING A VEHICLE TRAVELING ALONG A HIGHWAY, THE APPARATUS INCLUDING HIGHWAY ASSOCIATED MEANS COMPRISING A NETWORK FOR DIVIDING THE HIGHWAY INTO A SERIES OF SIMILAR CONDUCTIVE LOOPS, AN EXCITER COIL AND A PICKUP COIL DISPOSED IN FIXED RELATION ON THE VEHICLE, AN OSCILLATOR CONNECTED TO SAID EXCITER COIL WHEREBY THE PICKUP COIL RECEIVES, FROM SAID LOOPS, A SIGNAL OF VARYING AMPLITUDE AS THE EXCITER COIL PASSES FROM A POSITION OF VERTICAL REGISTRY OVER A GIVEN LOOP INTO A POSITION OF VERTICAL REGISTRY OVER A SUCEEDING LOOP, PULSE GENERATING MEANS CONNECTED TO SAID PICKUP COIL FOR GENERATING A SIGNAL WHOSE PULSE FREQUENCY IS PROPORTIONAL
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |