US3215824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic circuit for arithmetic operations
Assignee: ExxonMobil Upstream Research Co
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Filing: 1961-12-26
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Granted: 1965-11-02
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Warren A Alexander
- 👤 Ed R Mccarter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/163
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
AN ELECTRONIC CALCULATOR FOR ARITHMETIC OPERATIONS ON FIRST AND SECOND ELECTRICAL SIGNALS WHICH COMPRISES; AN ALTERNATING CURRENT SIGNAL AMPLIFIER HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL; A GAIN CONTROL CIRCUIT CONNECTED TO THE INPUT AND TO THE OUTPUT OF SAID AMPLIFIER, SAID GAIN CONMTROL CIRCUIT INCLUDING VARIABLE RESISTANCE MEANS TO REGULATE THE OUTPUT SIGNALS OF SAID AMPLIFIER, SAID GAIN CONTROL CIRCUIT BEING CONTROLLED BY SIGNALS OF A FREQUENCY DIFFERENT FROM THE FREQUENCIES OF SAID FIRST SIGNAL AND SAID SECOND SIGNAL TO VARY THE RESISTANCE OF SAID VARIABLE RESISTANCE MEANS; MEANS FOR ELECTRICALLY CONNECTING THE FIRST SIGNAL TO THE INPUT OF SID AMPLIFIER; MODULATING MEANS FOR PRODUCING AN AMPLITUDE MODULATED SIGNAL WHOSE FREQUENCY IS THE FREQUENCY TO WITH
References Cited (Backward Citations)
US2624505A
Cited
US3030022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |