Patent US3124035A successfully refreshed from Google Patents.
US3124035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-purpose projection device
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
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Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:00
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
AN OVERHEAD PROJECTION DEVICE, COMPRISING, A CASE HAVING AN APERTURE IN THE TOP AND THE FRONT THEREOF; LIGHT SOURCE MEANS, A FIRST HINGED REFLECTING SURFACE AND A SECOND STATIONARY REFLECTING SURFACE RESPECTIVELY DISPOSED ADJACENT SAID FRONT AND TOP APERTURES AND BEING RELATIVELY DISPOSED AND SPACED APART SO AS TO DIRECT THE LIGHT BEAM FROM SAID LIGHT SOURCE THROUGH A LIGHT PATH OF SUBSTANTIALLY THE SAME LENGTH AS THAT OF A CONVENTIONAL PROJECTOR, AND THROUGH SAID TOP APERTURE IN SAID CASE; A CONDENSING FRESNEL LENS SUPPORTED INTERIORLY OF SAID TOP APERTURE AND MEANS FOR POSITIONING MOVABLY THEREABOVE A TRANSPARENT BAND OF IMAGE-BEARING MATERIAL; FILM GUIDE MEANS, INDEPENDENT OF SAID LIGHT SOURCE AND BEING MOVABLE INTO THE LIGHT PATH THEREOF, FOR SUPPORTING PICTORIAL FILM AND SLIDE MATERIAL IN THE LIGHT BEAM OF SAID LIGHT SOURCE, AND LENS MEANS ASSOCIATED THEREWITH FOR PROJECTING SAID PICTORIAL MATERIAL WHEREBY AERIAL IMAGES THEREOF ARE FORMED ALONG A PLANE SUBSTANTIALLY COINCIDENT WITH
Claim 2
Dependent Claim
155 words
AN OVERHEAD PROJECTION DEVICE, COMPRISING, A CASE HAVING AN APERTURE IN THE TOP AND THE FRONT THEREOF; LIGHT SOURCE MEANS, A FIRST HINGED REFLECTING SURFACE AND A SECOND STATIONARY REFLECTING SURFACE RESPECTIVELY DISPOSED ADJACENT SAID FRONT AND TOP APERTURES AND BEING RELATIVELY DISPOSED AND SPACED APART SO AS TO DIRECT THE LIGHT BEAM FROM SAID LIGHT SOURCE THROUGH A LIGHT PATH OF SUBSTANTIALLY THE SAME LENGTH AS THAT OF A CONVENTIONAL PROJECTOR, AND THROUGH SAID TOP APERTURE IN SAID CASE; A CONDENSING FRESNEL LENS SUPPORTED INTERIORLY OF SAID TOP APERTURE AND MEANS FOR POSITIONING MOVABLY THEREABOVE A TRANSPARENT BAND OF IMAGE-BEARING MATERIAL; FILM GUIDE MEANS, INDEPENDENT OF SAID LIGHT SOURCE AND BEING MOVABLE INTO THE LIGHT PATH THEREOF, FOR SUPPORTING PICTORIAL FILM AND SLIDE MATERIAL IN THE LIGHT BEAM OF SAID LIGHT SOURCE, AND LENS MEANS ASSOCIATED THEREWITH FOR PROJECTING SAID PICTORIAL MATERIAL WHEREBY AERIAL IMAGES THEREOF ARE FORMED ALONG A PLANE SUBSTANTIALLY COINCIDENT WITH
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |