US3334814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature indicating circuit
Assignee: Monsanto Co
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Filing: 1965-04-05
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Granted: 1967-08-08
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Expires: 1985-04-05
Abstract
No abstract record available.
Inventors
- 👤 John R Bray
- 👤 George B Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:54
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906; G05D23/1909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
PARAMETER DEVIATION INDICATING MEANS COMPRISING IN COMBINATION: (A) AN AC SIGNAL SOURCE PRODUCING AN AC SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO A SENSED PARAMETER; (B) AN ASYMMETRICALLY CONDUCTIVE LOAD IMPEDANCE COUPLED TO SAID SOURCE WHEREBY CURRENT FLOWS IN SAID LOAD IMPEDANCE ONLY DURING SIGNAL HALF-CYCLES OF A GIVEN POLARITY; (C) PARAMETER INDICATING MEANS COMPRISING: (1) A DC METER, (2) A CIRCUIT MEANS COUPLING SAID METER TO SAID SOURCE, SAID CIRCUIT MEANS INCLUDING A SERIES RECTIFIER POLED TO PASS CURRENT ONLY WHEN SAID ACSIGNAL IS OF OPPOSITE POLARITY TO SAID GIVEN POLARITY.
Claim 2
Dependent Claim
91 words
PARAMETER DEVIATION INDICATING MEANS COMPRISING IN COMBINATION: (A) AN AC SIGNAL SOURCE PRODUCING AN AC SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO A SENSED PARAMETER; (B) AN ASYMMETRICALLY CONDUCTIVE LOAD IMPEDANCE COUPLED TO SAID SOURCE WHEREBY CURRENT FLOWS IN SAID LOAD IMPEDANCE ONLY DURING SIGNAL HALF-CYCLES OF A GIVEN POLARITY; (C) PARAMETER INDICATING MEANS COMPRISING: (1) A DC METER, (2) A CIRCUIT MEANS COUPLING SAID METER TO SAID SOURCE, SAID CIRCUIT MEANS INCLUDING A SERIES RECTIFIER POLED TO PASS CURRENT ONLY WHEN SAID ACSIGNAL IS OF OPPOSITE POLARITY TO SAID GIVEN POLARITY.
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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |