US2669899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monochromator
Assignee: Eastman Kodak Co
•
Filing: 1950-12-14
•
Granted: 1954-02-23
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Expires: 1970-12-14
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Macleish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:29
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/12; G01J3/14; G01J3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB550932A
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US2408512A
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US2453164A
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US2504949A
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US2548548A
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US2499322A
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US2587451A
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US2594334A
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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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |