Patent US2813451A successfully refreshed from Google Patents.
US2813451A
Expired / Lapsed
US
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Spectral scanning apparatus
Assignee: Beckman Coulter Inc
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Filing: 1951-12-06
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Granted: 1957-11-19
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Expires: 1971-12-06
Abstract
No abstract record available.
Inventors
- 👤 Michael E Stickney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:53
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1964365A
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US2236379A
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US2411741A
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US2572119A
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US2621298A
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US2462946A
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US2517121A
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US2499322A
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US2654287A
Cited
US2587451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |