Patent US3428402A successfully refreshed from Google Patents.
US3428402A
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Apparatus for determining the concentration of a substance in a solution
Assignee: CHARLES V BIDDY
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Filing: 1965-10-20
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Granted: 1969-02-18
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Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Charles V Biddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:05
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/06; G01N21/00; G01N21/17; G01N21/25; G01N21/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
APPARATUS FOR DETERMINING THE CONCENTRATION OF A SUBSTANCE IN A SOLUTION HAVING A MEASURABLE CHARACTERISTIC THAT VARIES WITH THE CONCENTRATION OF SAID SUBSTANCE IN THE SOLUTION, SAID APPARATUS COMPRISING MEANS FOR MEASURING SAID CHARACTERISTIC AND PROVIDING AN ELECTRICAL SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO SAID MEASURABLE CHARACTERISTIC, AN INDICATING CAM HAVING A CURVATURE REPRESENTATIVE OF A FUNCTION OF SAID MEASURABLE CHARACTERISTIC, MEANS FOR ROTATING SAID CAM THROUGH AN ANGLE PROPORTIONAL TO THE AMPLITUDE OF THE ELECTRICAL SIGNAL, A READ-OUT CAM HAVING A CURVATURE REPRESENTATIVE OF SAID FUNCTION OF SAID MEASURABLE CHARACTERISTIC OF THE SOLUTION FOR KNOWN CONCENTRATIONS OF SAID SUBSTANCE, MEANS FOR ROTATING SAID READ-OUT CAM THROUGH AN ANGLE DETERMINED BY THE POSITION OF THE INDICATING CAM, AND MEANS RESPONSIVE TO THE ANGLE OF ROTATION OF THE READ-OUT CAM TO INDICATE THE CONCENTRATION OF SAID UNKNOWN SOLUTION.
Claim 2
Dependent Claim
137 words
APPARATUS FOR DETERMINING THE CONCENTRATION OF A SUBSTANCE IN A SOLUTION HAVING A MEASURABLE CHARACTERISTIC THAT VARIES WITH THE CONCENTRATION OF SAID SUBSTANCE IN THE SOLUTION, SAID APPARATUS COMPRISING MEANS FOR MEASURING SAID CHARACTERISTIC AND PROVIDING AN ELECTRICAL SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO SAID MEASURABLE CHARACTERISTIC, AN INDICATING CAM HAVING A CURVATURE REPRESENTATIVE OF A FUNCTION OF SAID MEASURABLE CHARACTERISTIC, MEANS FOR ROTATING SAID CAM THROUGH AN ANGLE PROPORTIONAL TO THE AMPLITUDE OF THE ELECTRICAL SIGNAL, A READ-OUT CAM HAVING A CURVATURE REPRESENTATIVE OF SAID FUNCTION OF SAID MEASURABLE CHARACTERISTIC OF THE SOLUTION FOR KNOWN CONCENTRATIONS OF SAID SUBSTANCE, MEANS FOR ROTATING SAID READ-OUT CAM THROUGH AN ANGLE DETERMINED BY THE POSITION OF THE INDICATING CAM, AND MEANS RESPONSIVE TO THE ANGLE OF ROTATION OF THE READ-OUT CAM TO INDICATE THE CONCENTRATION OF SAID UNKNOWN SOLUTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |