Patent US1871640A successfully refreshed from Google Patents.
US3563646A
Expired / Lapsed
US
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Lap dissolve system for transparency projection
Assignee: Eastman Kodak Co
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Filing: 1969-01-31
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Granted: 1971-02-16
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Expires: 1989-01-31
Abstract
Abstract A DISSOLVING PROJECTOR INCLUDES TWO OBJECTIVE LENS SYSTEMS MOVABLE LATERALLY WHILE IN ALIGNMENT WITH CORRESPONDING LATERALLY MOVABLE SLIDES OR THE LIKE TO CONCURRENTLY REMOVE ONE SLIDE AND ITS RESPECTIVE LENS SYSTEM FROM A PROJECTION POSITION AS THE SUCCEEDING SLIDE AND ITS LENS SYSTEM MOVE INTO THAT POSITION, WHEREUPON THE LENS SYSTEM BEYOND THE PROJECTION POSITION IS TRANSPOSED INTO ALIGNEMENT WITH THE SLIDE TO BE DISPLAYED NEXT TO COMPLETE THE REPETITIVE SLIDE CHANGING CYCLE.
Inventors
- 👤 Donald M Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:42
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |