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US2867916A
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US
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Apparatus for optically mixing colors
Assignee: BERTRAM MICHAEL LANDEMANN
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Filing: 1954-10-19
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Granted: 1959-01-13
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Expires: 1974-10-19
Abstract
No abstract record available.
Inventors
- 👤 Sidney H Birdseye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:39
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; G01J3/0205; G01J3/0213; G01J3/12; G01J2003/1213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1864091A
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US1981999A
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US2272646A
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US2354367A
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US2431091A
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US2493991A
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US2589569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |