Patent US3277781A successfully refreshed from Google Patents.
US3277781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tri-fold rear projection screen
Assignee: Individual
•
Filing: 1965-06-17
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Granted: 1966-10-11
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Expires: 1985-06-17
Abstract
No abstract record available.
Inventors
- 👤 Guilford L Moutray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:02
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/58; G03B21/60; G03B21/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A DAYLIGHT REAR PROJECTION FOLDING SCREEN FOR RECEIVING AN IMAGE FROM A PROJECTOR, COMPRISING: A RECTANGULAR BACK WALL; A FERROTYPE PLATE FLATLY SECURED TO ONE SURFACE OF SAID BACK WALL; A SCREEN FRAME HINGEDLY CONNECTED TO ONE END OF SAID BACK WALL; AN IMAGE REFLECTING SCREEN EXTENDING ACROSS SAID FRAME; A FRONT WALL HINGEDLY CONNECTED TO THE OTHER END OF SAID BACK WALL, THE FREE EDGE SURFACES OF SAID FRAME AND SAID FRONT WALL COINCIDING IN A COMMON PLANE WHEN PIVOTED OUTWARDLY FROM SAID BACK WALL, SAID FRONT WALL HAVING A CENTRAL IMAGE BEAM PASSING OPENING; IMAGE BEAM LIGHT SHIELDING MEANS COMPRISING SIDE DOORS INTERCONNECTED WITH UPPER AND LOWER FOLDING PANELS SECURED TO SAID FRONT WALL AROUND THE OPENING; AND TRIANGULAR-SHAPED FLEXIBLE MEMBERS SECURED BY RESPECTIVE SIDE EDGES TO RESPECTIVE SIDE EDGES OF SAID BACK WALL AND SAID FRAME AND MEETING, AT THEIR OTHER RESPECTIVE SIDE EDGE, THE RESPECTIVE SIDE EDGE OF SAID FRONT WALL WHEN SAID FRAME AND SAID FRONT WALL ARE PIVOTED OUTWARDLY IN FREE EDGE MEETING POSITION.
Claim 2
Dependent Claim
170 words
A DAYLIGHT REAR PROJECTION FOLDING SCREEN FOR RECEIVING AN IMAGE FROM A PROJECTOR, COMPRISING: A RECTANGULAR BACK WALL; A FERROTYPE PLATE FLATLY SECURED TO ONE SURFACE OF SAID BACK WALL; A SCREEN FRAME HINGEDLY CONNECTED TO ONE END OF SAID BACK WALL; AN IMAGE REFLECTING SCREEN EXTENDING ACROSS SAID FRAME; A FRONT WALL HINGEDLY CONNECTED TO THE OTHER END OF SAID BACK WALL, THE FREE EDGE SURFACES OF SAID FRAME AND SAID FRONT WALL COINCIDING IN A COMMON PLANE WHEN PIVOTED OUTWARDLY FROM SAID BACK WALL, SAID FRONT WALL HAVING A CENTRAL IMAGE BEAM PASSING OPENING; IMAGE BEAM LIGHT SHIELDING MEANS COMPRISING SIDE DOORS INTERCONNECTED WITH UPPER AND LOWER FOLDING PANELS SECURED TO SAID FRONT WALL AROUND THE OPENING; AND TRIANGULAR-SHAPED FLEXIBLE MEMBERS SECURED BY RESPECTIVE SIDE EDGES TO RESPECTIVE SIDE EDGES OF SAID BACK WALL AND SAID FRAME AND MEETING, AT THEIR OTHER RESPECTIVE SIDE EDGE, THE RESPECTIVE SIDE EDGE OF SAID FRONT WALL WHEN SAID FRAME AND SAID FRONT WALL ARE PIVOTED OUTWARDLY IN FREE EDGE MEETING POSITION.
References Cited (Backward Citations)
US1283590A
Cited
US2062878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |