US3192827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lensless slide projection apparatus
Assignee: Individual
•
Filing: 1961-05-22
•
Granted: 1965-07-06
•
Expires: 1981-05-22
Abstract
No abstract record available.
Inventors
- 👤 Nagy Elemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:30
CPC Classifications
G; G03; G03B; G03B23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A LENSLESS SLIDE PROJECTOR UNIT, COMPRISING; A SUPPORT, A PAIR OF SLIDE PROJECTORS MOUNTED SAID SUPPORT, SAID PROJECTORS HAVING HOUSINGS WITH SUBSTANTIALLY PARALLEL LONGITUDINAL AXES, SAID PROJECTOR HOUSINGS HAVING FIRST PORTIONS AND SECOND PORTIONS ROTATABLY MOUNTED THEREON FOR ADJUSTMENT ABOUT THEIR LONGITUDINAL AXES, SAID SECOND PORTIONS DEFINING HOUSING OPENING AT ONE END THEREOF, INCANDESCENT BULBS HAVING SUBSTANITALLY POINT LIGHT SOURCES THEREIN MOUNTED WITHIN SAID FIRST HOUSING PORTIONS, SUPPORT MEANS ON SAID SECOND HOUSING PORTIONS FOR RETAINING TRANSPARENT SLIDES IN PLANES EXTENDING PERPENDICULAR TO THE LONGITUDINAL AXES, AND MEANS IN AT LEAST ONE OF THE SLIDE PROJECTORS FOR ADJUSTING THE LONGITUDINAL DISTANCE BETWEEN ITS BULB AND SUPPORT MEANS.
Claim 2
Dependent Claim
107 words
A LENSLESS SLIDE PROJECTOR UNIT, COMPRISING; A SUPPORT, A PAIR OF SLIDE PROJECTORS MOUNTED SAID SUPPORT, SAID PROJECTORS HAVING HOUSINGS WITH SUBSTANTIALLY PARALLEL LONGITUDINAL AXES, SAID PROJECTOR HOUSINGS HAVING FIRST PORTIONS AND SECOND PORTIONS ROTATABLY MOUNTED THEREON FOR ADJUSTMENT ABOUT THEIR LONGITUDINAL AXES, SAID SECOND PORTIONS DEFINING HOUSING OPENING AT ONE END THEREOF, INCANDESCENT BULBS HAVING SUBSTANITALLY POINT LIGHT SOURCES THEREIN MOUNTED WITHIN SAID FIRST HOUSING PORTIONS, SUPPORT MEANS ON SAID SECOND HOUSING PORTIONS FOR RETAINING TRANSPARENT SLIDES IN PLANES EXTENDING PERPENDICULAR TO THE LONGITUDINAL AXES, AND MEANS IN AT LEAST ONE OF THE SLIDE PROJECTORS FOR ADJUSTING THE LONGITUDINAL DISTANCE BETWEEN ITS BULB AND SUPPORT MEANS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |