US2834247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical density analyzing apparatus
Assignee: Beckman Coulter Inc
•
Filing: 1955-01-26
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Granted: 1958-05-13
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Expires: 1975-01-26
Abstract
No abstract record available.
Inventors
- 👤 Edward G Pickels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:51
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/22; G01J1/24; G01N; G01N21/00; G01N21/17; G01N21/59; G01N21/5907; G01N21/5911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1278994A
Cited
US1520874A
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US2159882A
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US2073223A
Cited
US2139474A
Cited
FR1024076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |