Patent US3369447A successfully refreshed from Google Patents.
US3369447A
Expired / Lapsed
US
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Gain control for spectrophotometers
Assignee: Beckman Coulter Inc
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Filing: 1964-06-10
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Granted: 1968-02-20
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Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 William S Gallaway
- 👤 Franklyn L Waska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:35
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/42; G01J3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A SPECTROPHOTOMETER HAVING A WAVELENGTH DRIVE MEANS AND A RADIATION SENSING MEANS WHEREIN THE ELECTRICAL OUTPUT SIGNAL VARIES AS A FUNCTION OF WAVELENGTH, THE IMPROVEMENT COMPRISING: A RADIATION SOURCE; A PHOTOSENSITIVE IMPEDANCE MEANS CONNECTED TO SAID RADIATION SENSING MEANS FOR CONTROLLING THE OUTPUT THEREOF AND POSITIONED TO RECEIVE RADIATION FROM SAID SOURCE; AND MEANS FOR CONTROLLING THE INTENSITY OF THE RADIATION IMPINGING UPON SAID PHOTOSENSITIVE IMPEDANCE MEANS AS A FUNCTION OF THE WAVELENGTH OF THE RADIATION IMPINGING UPON SAID RADIATION SENSING MEANS, SUCH THAT VARIATIONS IN THE OUTPUT OF SAID RADIATION SENSING MEANS AS A FUNCTION OF WAVELENGTHS IN THE ABSENCE OF ABSORPTION BY A SAMPLE ARE SUBSTNATIALLY COMPENSATED.
Claim 2
Dependent Claim
110 words
IN A SPECTROPHOTOMETER HAVING A WAVELENGTH DRIVE MEANS AND A RADIATION SENSING MEANS WHEREIN THE ELECTRICAL OUTPUT SIGNAL VARIES AS A FUNCTION OF WAVELENGTH, THE IMPROVEMENT COMPRISING: A RADIATION SOURCE; A PHOTOSENSITIVE IMPEDANCE MEANS CONNECTED TO SAID RADIATION SENSING MEANS FOR CONTROLLING THE OUTPUT THEREOF AND POSITIONED TO RECEIVE RADIATION FROM SAID SOURCE; AND MEANS FOR CONTROLLING THE INTENSITY OF THE RADIATION IMPINGING UPON SAID PHOTOSENSITIVE IMPEDANCE MEANS AS A FUNCTION OF THE WAVELENGTH OF THE RADIATION IMPINGING UPON SAID RADIATION SENSING MEANS, SUCH THAT VARIATIONS IN THE OUTPUT OF SAID RADIATION SENSING MEANS AS A FUNCTION OF WAVELENGTHS IN THE ABSENCE OF ABSORPTION BY A SAMPLE ARE SUBSTNATIALLY COMPENSATED.
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |