US3489498A
Expired / Lapsed
US
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Flame photometric detector with improved specificity to sulfur and phosphorus
Assignee: Melpar Inc
•
Filing: 1965-11-05
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Granted: 1970-01-13
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Expires: 1985-11-05
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Brody
- 👤 John E Chaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:58
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/626; G01N21/00; G01N21/62; G01N21/71; G01N21/72; G01N30/00; G01N30/02; G01N30/62; G01N30/64; G01N30/68; G01N2030/647; G01N2030/685; Y; Y10; Y10T; Y10T436/00; Y10T436/16; Y10T436/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2058522A
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US2664779A
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US3039856A
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US3133201A
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US3213747A
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US3140919A
Cited
US3169832A
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US3211050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |