US2552184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminator for optical projectors
Assignee: Eastman Kodak Co
•
Filing: 1950-06-02
•
Granted: 1951-05-08
•
Expires: 1970-06-02
Abstract
No abstract record available.
Inventors
- 👤 George J Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/281; G02B5/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1342894A
Cited
US1434268A
Cited
FR475318A
Cited
US1430494A
Cited
US1750910A
Cited
US2225485A
Cited
US2279084A
Cited
US2466119A
Cited
US2466430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |