US3074309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame spectrophotometry
Assignee: National Research Development Corp UK
•
Filing: 1959-01-06
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Granted: 1963-01-22
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Expires: 1979-01-06
Abstract
No abstract record available.
Inventors
- 👤 Exley Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:02
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/72; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A FLAME SPECTROPHOTOMETER INCLUDING A BURNER OF THE ASPIRATOR TYPE, A VESSEL FOR CONTAINING A SOLUTION TO BE FED TO THE BURNER, MEANS FOR FEEDING SAID SOLUTION TO SAID BURNER, A PHOTOELECTRIC TRANSDUCER FOR VIEWING THE FLAME OF SAID BURNER, AN INTEGRATOR CIRCUIT CONNECTED TO THE OUTPUT OF SAID TRANSDUCER, AND DETECTOR MEANS ASSOCIATED WITH THE BURNER FOR DETECTING THE PRESENCE OF SOLUTION BEING FED TO THE BURNER, WHICH DETECTOR MEANS SERVES TO COMPLETE THE INTEGRATOR CIRCUIT ONLY DURING FEEDING OF SAID SOLUTION TO THE BURNER AND TO TERMINATE INTEGRATION BY THE INTEGRATOR CIRCUIT WHEN SAID SOLUTION CEASES TO BE FED TO THE BURNER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |