US3445643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic multiplier/divider for fluid flow systems
Assignee: Fischer and Porter Co
•
Filing: 1966-09-22
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Granted: 1969-05-20
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Expires: 1986-09-22
Abstract
No abstract record available.
Inventors
- 👤 Roy L Schmoock
- 👤 Isao Asai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:48
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/161
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A MULTIPLIER/DIVIDER COMPRISING: FIRST AND SECOND MULTIPLIER CIRCUIT; MEANS FOR COUPLING A FIRST ANALOG INPUT TO SAID FIRST MULTIPLIER CIRCUIT; MEANS FOR COUPLING A SECOND ANALOG INPUT TO SAID SECOND MULTIPLIER CIRCUIT; A HIGH GAIN AMPLIFIER; MEANS FOR COUPLING A THIRD ANALOG INPUT TO SAID AMPLIFIER; MEANS FOR APPLYING THE OUTPUT OF SAID SECOND MULTIPLIER TO SAID AMPLIFIER AS A NEGATIVE FEEDBACK SIGNAL; MEANS COUPLED TO SAID AMPLIFIER OUTPUT FOR DERIVING A DUTY CYCLE SIGNAL WHICH SHARES ON-OFF TIME DEPENDENT UPON SAID AMPLFIER OUTPUT; A MEANS FOR APPLYING SAID DUTY CYCLE SIGNAL TO EACH OF SAID MULTIPLIER CIRCUITS.
Claim 2
Dependent Claim
98 words
A MULTIPLIER/DIVIDER COMPRISING: FIRST AND SECOND MULTIPLIER CIRCUIT; MEANS FOR COUPLING A FIRST ANALOG INPUT TO SAID FIRST MULTIPLIER CIRCUIT; MEANS FOR COUPLING A SECOND ANALOG INPUT TO SAID SECOND MULTIPLIER CIRCUIT; A HIGH GAIN AMPLIFIER; MEANS FOR COUPLING A THIRD ANALOG INPUT TO SAID AMPLIFIER; MEANS FOR APPLYING THE OUTPUT OF SAID SECOND MULTIPLIER TO SAID AMPLIFIER AS A NEGATIVE FEEDBACK SIGNAL; MEANS COUPLED TO SAID AMPLIFIER OUTPUT FOR DERIVING A DUTY CYCLE SIGNAL WHICH SHARES ON-OFF TIME DEPENDENT UPON SAID AMPLFIER OUTPUT; A MEANS FOR APPLYING SAID DUTY CYCLE SIGNAL TO EACH OF SAID MULTIPLIER CIRCUITS.
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) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |