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Patent US2858729A successfully refreshed from Google Patents.
US2858729A
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US
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Flame photometer atomizer burner assembly
Assignee: Individual
•
Filing: 1955-05-10
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Granted: 1958-11-04
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Expires: 1975-05-10
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Keyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:56
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1889705A
Cited
GB408605A
Cited
DE679452C
Cited
GB599190A
Cited
US2714833A
Cited
US2664779A
Cited
US2753753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |