Patent US2421363A successfully refreshed from Google Patents.
US3406383A
Expired / Lapsed
US
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Analog keyed phase transmitter and system
Assignee: Robertshaw Controls Co
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Filing: 1964-08-21
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Granted: 1968-10-15
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Expires: 1984-08-21
Abstract
No abstract record available.
Inventors
- 👤 Maynard D Mcfarlane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:43
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/20; H04L27/2032; H04L27/2053; H04L27/2057; G; G08; G08C; G08C19/00; G08C19/12; H04L27/22; H04L27/233; H04L27/2335; H04L27/2337
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN AN ANALOG DATA TRANSMITTING SYSTEM WHEREIN A SINGLE FREQUENCY WAVE IS PHASE MODULATED IN STEPS TO CONVEY DATA BITS, TRANSMITTER APPARATUS, COMPRISING MEANS GENERATING A FIXED FREQUENCY CARRIER WAVE HAVING A PLURALITY OF OUTPUT PHASE DIFFERING BY LIKE STEPS OF ADVANCEMENT FOR RETARDATION, SENSING MEANS FOR PRODUCING A VOLTAGE OUTPUT VARYING ACCORDING TO THE MAGNITUDE AND DIRECTION OF DEVIATIONS IN ANALOG DATA SENSED, CONTROL SIGNAL GENERATING MEANS RESPONSIVELY CONNECTED TO SAID SENSING MEANS FOR PRODUCING A NUMBER OF SUCCESSIVE POSITIVE OR NEGATIVE CONTROL PULSES ACCORDING TO THE MAGNITUDE AND DIRECTION OF A SAID DEVIATION OF DATA SENSED, AND PHASE SELECTING MEANS CONTROLLED BY SAID PULSES TO SELECT FOR SUCCESSIVE TRANSMISSION A NUMBER OF PHASES SUC-
Claim 2
Dependent Claim
116 words
IN AN ANALOG DATA TRANSMITTING SYSTEM WHEREIN A SINGLE FREQUENCY WAVE IS PHASE MODULATED IN STEPS TO CONVEY DATA BITS, TRANSMITTER APPARATUS, COMPRISING MEANS GENERATING A FIXED FREQUENCY CARRIER WAVE HAVING A PLURALITY OF OUTPUT PHASE DIFFERING BY LIKE STEPS OF ADVANCEMENT FOR RETARDATION, SENSING MEANS FOR PRODUCING A VOLTAGE OUTPUT VARYING ACCORDING TO THE MAGNITUDE AND DIRECTION OF DEVIATIONS IN ANALOG DATA SENSED, CONTROL SIGNAL GENERATING MEANS RESPONSIVELY CONNECTED TO SAID SENSING MEANS FOR PRODUCING A NUMBER OF SUCCESSIVE POSITIVE OR NEGATIVE CONTROL PULSES ACCORDING TO THE MAGNITUDE AND DIRECTION OF A SAID DEVIATION OF DATA SENSED, AND PHASE SELECTING MEANS CONTROLLED BY SAID PULSES TO SELECT FOR SUCCESSIVE TRANSMISSION A NUMBER OF PHASES SUC-
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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) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |