US2804800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Episcopic optical system for contour projector
Assignee: Eastman Kodak Co
•
Filing: 1954-07-30
•
Granted: 1957-09-03
•
Expires: 1974-07-30
Abstract
No abstract record available.
Inventors
- 👤 Bert V Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:03
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1687946A
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US1812765A
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US1919022A
Cited
US2061378A
Cited
US2035780A
Cited
US2552238A
Cited
US2552272A
Cited
US2552280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |