Patent US3296445A successfully refreshed from Google Patents.
US3296445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring arrangement using photomultiplier tube with dark current correction
Assignee: Agfa Gevaert NV
•
Filing: 1963-12-05
•
Granted: 1967-01-03
•
Expires: 1983-12-05
Abstract
No abstract record available.
Inventors
- 👤 Roos Gunther
- 👤 Wick Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:44
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/80; G01; G01J; G01J1/00; G01J1/42; G01J1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN A PHOTOELECTRIC MEASURING ARRANGEMENT, PARTICULARLY SUITABLE FOR CONTROLLING PHOTOGRAPHIC PRINTING DEVICES, IN COMBINATION, A SOURCE OF ALTERNATING CURRENT; PHOTOMULTIPLIER TUBE MEANS HAVING AN ANODE, A CATHODE AND DYNODES, SAID CATHODE AND DYNODES BEING CONNECTED TO SAID SOURCE FOR BEING ENERGIZED THEREBY AND SAID CATHODE BEING ARRANGED FOR BEING EXPOSED TO ILLUMINATION, FOR FURNISHING AN OUTPUT CURRENT SUBSTANTIALLY PROPORTIONAL TO THE INTENSITY OF ILLUMINATION APPLIED TO SAID CATHODE; ELECTRIC CIRCUIT MEANS CONNECTED TO SAID PHOTOMULTIPLIER
Claim 2
Dependent Claim
75 words
IN A PHOTOELECTRIC MEASURING ARRANGEMENT, PARTICULARLY SUITABLE FOR CONTROLLING PHOTOGRAPHIC PRINTING DEVICES, IN COMBINATION, A SOURCE OF ALTERNATING CURRENT; PHOTOMULTIPLIER TUBE MEANS HAVING AN ANODE, A CATHODE AND DYNODES, SAID CATHODE AND DYNODES BEING CONNECTED TO SAID SOURCE FOR BEING ENERGIZED THEREBY AND SAID CATHODE BEING ARRANGED FOR BEING EXPOSED TO ILLUMINATION, FOR FURNISHING AN OUTPUT CURRENT SUBSTANTIALLY PROPORTIONAL TO THE INTENSITY OF ILLUMINATION APPLIED TO SAID CATHODE; ELECTRIC CIRCUIT MEANS CONNECTED TO SAID PHOTOMULTIPLIER
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |