US3245304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photometric analyzer
Assignee: Bio Science Laboratories
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Filing: 1961-08-14
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Granted: 1966-04-12
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Expires: 1981-08-14
Abstract
No abstract record available.
Inventors
- 👤 John E Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:07
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN APPARATUS FOR DETERMINING THE RADIATION ABSORPTION CHARACTERISTICS OF SAMPLE: A SERVOMECHANISM HAVING AN OUTPUT MEMBER FOR POSITIONING AN INDICATOR, AND HAVING AN INPUT; FIRST CIRCUIT MEANS HAVING A MOVABLE ELEMENT AND PROVIDING A SIGNAL THE MAGNITUDE OF WHICH IS A FIRST PROPORTIONALITY CONSTANT MULTIPLIED BY THE POSITION OF SAID ELEMENT; SECOND CIRCUIT MEANS HAVING A MOVABLE ELEMENT AND PROVIDING A SIGNAL THE MAGNITUDE OF WHICH IS A SECOND PROPORTIONALITY CONSTANT MULTIPLIED BY LOG 1/1-X WHERE X IS THE POSITION OF ITS MOVABLE ELEMENT; MEANS FOR APPLYING THE SIGNALS IN DIFFERENTIAL ARRANGEMENT TO THE INPUT OF THE SERVOMECHANISM; MEANS COUPLING THE MOVABLE ELEMENT OF THE FIRST CIRCUIT MEANS TO THE OUTPUT MEMBER IN NEGATIVE FEEDBACK RELATIONSHIP; MEANS POSITIONING THE MOVABLE ELEMENT OF THE SECOND CIRCUIT MEANS IN DIRECT PROPORTION TO THE TRANSMITTANCE OF SAID SAMPLE; AND MEANS CONNECTED TO ONE OF SAID CIRCUIT MEANS FOR RALATIVELY ADJUSTING THE PRORORTIONALITY CONSTANTS OF THE CIRCUIT MEANS.
Claim 2
Dependent Claim
154 words
IN APPARATUS FOR DETERMINING THE RADIATION ABSORPTION CHARACTERISTICS OF SAMPLE: A SERVOMECHANISM HAVING AN OUTPUT MEMBER FOR POSITIONING AN INDICATOR, AND HAVING AN INPUT; FIRST CIRCUIT MEANS HAVING A MOVABLE ELEMENT AND PROVIDING A SIGNAL THE MAGNITUDE OF WHICH IS A FIRST PROPORTIONALITY CONSTANT MULTIPLIED BY THE POSITION OF SAID ELEMENT; SECOND CIRCUIT MEANS HAVING A MOVABLE ELEMENT AND PROVIDING A SIGNAL THE MAGNITUDE OF WHICH IS A SECOND PROPORTIONALITY CONSTANT MULTIPLIED BY LOG 1/1-X WHERE X IS THE POSITION OF ITS MOVABLE ELEMENT; MEANS FOR APPLYING THE SIGNALS IN DIFFERENTIAL ARRANGEMENT TO THE INPUT OF THE SERVOMECHANISM; MEANS COUPLING THE MOVABLE ELEMENT OF THE FIRST CIRCUIT MEANS TO THE OUTPUT MEMBER IN NEGATIVE FEEDBACK RELATIONSHIP; MEANS POSITIONING THE MOVABLE ELEMENT OF THE SECOND CIRCUIT MEANS IN DIRECT PROPORTION TO THE TRANSMITTANCE OF SAID SAMPLE; AND MEANS CONNECTED TO ONE OF SAID CIRCUIT MEANS FOR RALATIVELY ADJUSTING THE PRORORTIONALITY CONSTANTS OF THE CIRCUIT MEANS.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |