Patent US3262750A successfully refreshed from Google Patents.
US3262750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for motion picture projection by means of a rotating prism provided with shutter
Assignee: INTERNATIONALE FONOVISIONE SpA Soc
•
Filing: 1964-06-09
•
Granted: 1966-07-26
•
Expires: 1984-06-09
Abstract
No abstract record available.
Inventors
- 👤 Bottani Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:15
CPC Classifications
G; G03; G03B; G03B41/00; G03B41/02; G03B41/04; G03B41/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A MOTION PICTURE PROJECTION APPARATUS FOR PROJECTING ALONG AN OPTICAL AXIS AND ONTO A SCREEN FILM MOVING IN A GIVEN DIRECTION, COMPRISING A LIGHT SOURCE, A MULTI FACETED PRISM MOUNTED FOR ROTATING IN TIMED RELATION WITH AND IN THE SAME DIRECTION AD SAID FILM, THE AXIS OF ROTATION OF SAID PRIMS BEING INTERSECTED BY SAID OPTICAL AXIS, MEANS FOR SUPPORTING THE FILM IN CLOSE CONFRONTING RELATION WITH SAID PRISM, A LIGHT-SHUTTER DISPOSED BETWEEN SAID LIGHT SOURCE AND SAID SCEEN FOR INTERRUPTING THE PROJECTION OF LIGHT OF LEAST THREE EQUI-SPACED TIMES DURING THE TIME IT TAKES A FRAME OF SAID FILM TO PASS BY THE OPTICAL AXIS OF SAID APPARATUS.
Claim 2
Dependent Claim
109 words
A MOTION PICTURE PROJECTION APPARATUS FOR PROJECTING ALONG AN OPTICAL AXIS AND ONTO A SCREEN FILM MOVING IN A GIVEN DIRECTION, COMPRISING A LIGHT SOURCE, A MULTI FACETED PRISM MOUNTED FOR ROTATING IN TIMED RELATION WITH AND IN THE SAME DIRECTION AD SAID FILM, THE AXIS OF ROTATION OF SAID PRIMS BEING INTERSECTED BY SAID OPTICAL AXIS, MEANS FOR SUPPORTING THE FILM IN CLOSE CONFRONTING RELATION WITH SAID PRISM, A LIGHT-SHUTTER DISPOSED BETWEEN SAID LIGHT SOURCE AND SAID SCEEN FOR INTERRUPTING THE PROJECTION OF LIGHT OF LEAST THREE EQUI-SPACED TIMES DURING THE TIME IT TAKES A FRAME OF SAID FILM TO PASS BY THE OPTICAL AXIS OF SAID APPARATUS.
References Cited (Backward Citations)
US2476503A
Cited
US2906167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |