US3285126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desk level overhead projector
Assignee: Individual
•
Filing: 1966-05-06
•
Granted: 1966-11-15
•
Expires: 1986-05-06
Abstract
No abstract record available.
Inventors
- 👤 James W Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:17
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/132; Y; Y10; Y10S; Y10S353/00; Y10S353/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN OVERHEAD PROJECTOR COMPRISING: A CASE, LIGHT SOURCE MEANS AFFIXED INTERIORLY OF SAID RIGID WITH SAID CASE, A PLANAR RELFLECTOR EFFECTIVE TO DIRECT THE BEAM FROM SAID LIGHT SOURCE DOWNWARDLY THROUGH A PICTURE APERTURE IN SAID CASE, A PLANAR REFLECTOR AND PROJECTION LENS MOVABLY SUPPORTED BY SAID CASE ABOVE SAID APERTURE AND ADAPTED TO PROJECT IMAGES FROM SAID APERTURE ALONG AN ANGULAR LIGHT PATH ONTO A VIEWING SCREEN, AND A CONVERGING REFLECTOR BEHIND SAID PICTURE APERTURE EFFECTIVE TO REDIRECT SAID LIGHT BEAM BACK THROUGH SAID APERTURE AND INTO SAID PROJECTION LENS.
Claim 2
Dependent Claim
91 words
AN OVERHEAD PROJECTOR COMPRISING: A CASE, LIGHT SOURCE MEANS AFFIXED INTERIORLY OF SAID RIGID WITH SAID CASE, A PLANAR RELFLECTOR EFFECTIVE TO DIRECT THE BEAM FROM SAID LIGHT SOURCE DOWNWARDLY THROUGH A PICTURE APERTURE IN SAID CASE, A PLANAR REFLECTOR AND PROJECTION LENS MOVABLY SUPPORTED BY SAID CASE ABOVE SAID APERTURE AND ADAPTED TO PROJECT IMAGES FROM SAID APERTURE ALONG AN ANGULAR LIGHT PATH ONTO A VIEWING SCREEN, AND A CONVERGING REFLECTOR BEHIND SAID PICTURE APERTURE EFFECTIVE TO REDIRECT SAID LIGHT BEAM BACK THROUGH SAID APERTURE AND INTO SAID PROJECTION LENS.
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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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |