US3134299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection screen device with vertically adjustable detachable legs
Assignee: Individual
•
Filing: 1961-09-15
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Granted: 1964-05-26
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Expires: 1981-09-15
Abstract
No abstract record available.
Inventors
- 👤 Ralph G Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:58
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROJECTION SCREEN DEVICE COMPRISING AN ELONGATED HOUSING OF OPAQUE MATERIAL, A TRANSLUCENT PROJECTION SCREEN FORMING A PORTION OF ONE END WALL OF SAID HOUSING, AN ELONGATED LIGHT TRANSMISSION CONDUIT CONNECTED TO THE OPPOSITE END WALL OF SAID HOUSING AND BEING ADAPTED TO RECEIVE THE PROJECTION LENS ASSEMBLY OF A PICTURE PROJECTION APPARATUS, A PLURALITY OF VERTICALLY SPACED OUTWARDLY PROJECTING VERTICALLY ALIGNED PEGS SECURED TO EACH END PORTION OF EACH OF THE OPPOSITE SIDES OF THE HOUSING, AND RESPECTIVE APERTURED VERTICAL SUPPORTING LEGS ADJACENT SAID END PORTIONS, EACH OF SAID LEGS HAVING A SERIES OF UNIFORMLY SPACED APERTURES LOCATED SO THAT A SELECTED GROUP OF APERTURES CAN BE SIMULTANEOUSLY ENGAGED ON THE SET OF VERTICALLY ALIGNED PEGS AT EACH OF SAID END PORTIONS.
Claim 2
Dependent Claim
123 words
A PROJECTION SCREEN DEVICE COMPRISING AN ELONGATED HOUSING OF OPAQUE MATERIAL, A TRANSLUCENT PROJECTION SCREEN FORMING A PORTION OF ONE END WALL OF SAID HOUSING, AN ELONGATED LIGHT TRANSMISSION CONDUIT CONNECTED TO THE OPPOSITE END WALL OF SAID HOUSING AND BEING ADAPTED TO RECEIVE THE PROJECTION LENS ASSEMBLY OF A PICTURE PROJECTION APPARATUS, A PLURALITY OF VERTICALLY SPACED OUTWARDLY PROJECTING VERTICALLY ALIGNED PEGS SECURED TO EACH END PORTION OF EACH OF THE OPPOSITE SIDES OF THE HOUSING, AND RESPECTIVE APERTURED VERTICAL SUPPORTING LEGS ADJACENT SAID END PORTIONS, EACH OF SAID LEGS HAVING A SERIES OF UNIFORMLY SPACED APERTURES LOCATED SO THAT A SELECTED GROUP OF APERTURES CAN BE SIMULTANEOUSLY ENGAGED ON THE SET OF VERTICALLY ALIGNED PEGS AT EACH OF SAID END PORTIONS.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |