US3257900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection screen
Assignee: Individual
•
Filing: 1963-10-25
•
Granted: 1966-06-28
•
Expires: 1983-10-25
Abstract
No abstract record available.
Inventors
- 👤 Goodbar Isaac
- 👤 Price Edison Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:36
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROJECTION SCREEN COMPOSED OF A PLURALITY OF ELEMENTS COMPRISING SURFACES INTENDED TO RECEIVER THE LIGHT FROM THE PROJECTOR, WHICH WILL BE CALLED RECEIVING SURFACES AND SPECULARLY REFLECTING SURFACES WHICH WILL BE CALLED SPECULAR SURFACES, SAID SPECULAR SURFACES INTENDED TO CONCENTRATE THE LIGHT FROM THE PROJECTOR ON THE RECEIVING SURFACES AND TO REFLECT THE LIGHT FROM SUCH RECEIVING SURFACES INTO THE ZONE WHERE THE SPECTATORS MAY BE LOCATED; THE ABOVEMENTIONED RECEIVING SURFACES BEING OF ANY SHAPE TO WHICH TANGENTS CAN BE DRAWN AND THE ABOVEMENTIONED SPECULAR SURFACES BEING OF CYLINDRICAL SHAPE WITH GENERATRICES RUNNING PARALLEL TO THE INTERSECTIONS OF PAIRS OF LIMITING PLANES BEYOND WHICH NO SPECTATORS OR PROJECTORS CAN BE LOCATED, AND THE INTERSECTION OF EACH OF THESE CYLINDRICAL SPECULAR SURFACES WITH A PLANE OF COORDINATES NORMAL TO TIS GENERATRICES BEING DEFINED BY THE FOLLOWING EQUATIONS:
Claim 2
Dependent Claim
137 words
A PROJECTION SCREEN COMPOSED OF A PLURALITY OF ELEMENTS COMPRISING SURFACES INTENDED TO RECEIVER THE LIGHT FROM THE PROJECTOR, WHICH WILL BE CALLED RECEIVING SURFACES AND SPECULARLY REFLECTING SURFACES WHICH WILL BE CALLED SPECULAR SURFACES, SAID SPECULAR SURFACES INTENDED TO CONCENTRATE THE LIGHT FROM THE PROJECTOR ON THE RECEIVING SURFACES AND TO REFLECT THE LIGHT FROM SUCH RECEIVING SURFACES INTO THE ZONE WHERE THE SPECTATORS MAY BE LOCATED; THE ABOVEMENTIONED RECEIVING SURFACES BEING OF ANY SHAPE TO WHICH TANGENTS CAN BE DRAWN AND THE ABOVEMENTIONED SPECULAR SURFACES BEING OF CYLINDRICAL SHAPE WITH GENERATRICES RUNNING PARALLEL TO THE INTERSECTIONS OF PAIRS OF LIMITING PLANES BEYOND WHICH NO SPECTATORS OR PROJECTORS CAN BE LOCATED, AND THE INTERSECTION OF EACH OF THESE CYLINDRICAL SPECULAR SURFACES WITH A PLANE OF COORDINATES NORMAL TO TIS GENERATRICES BEING DEFINED BY THE FOLLOWING EQUATIONS:
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |