Patent US3236150A successfully refreshed from Google Patents.
US3236150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screens for projecting systems
Assignee: Individual
•
Filing: 1961-02-13
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Granted: 1966-02-22
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Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 Wendell S Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:00
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/602
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A SCREEN COMPRISING A PLURALITY OF SUBSTANTIALLY SPECULAR FACETS OF GENERALLY TRAPEZOIDAL SHAPE, WITH ONE OF THE PARALLEL SIDES OF SAID TRAPEZOIDS BEING LARGER THAN THE OTHER, SAID FACETS EACH BELONGING TO ONE ONLY OF TWO DISTINCT CLASSES, FACETS OF ONE OF SAID CLASSES HAVING POSITIVE CURVATURE AND FACETS OF THE OTHER OF SAID CLASSES HAVING NEGATIVE CURVATURE, FACETS OF SAID TWO CLASSES BEING INTERMINGLED ON THE FACE OF SAID SCREEN IN ESSENTIALLY CHECKERBOARD FASHION, SAID FACETS BEING SO ORIENTED ON THE FACE OF SAID SCREEN THAT THOSE OF ONE CLASS HAVE THE LONGER OF THEIR PARALLEL SIDES POSITIONED TOWARD ONE DIRECTION ON SAID SCREEN, AND FACETS OF THE OTHER CLASS HAVE THE LONGER OF THEIR TWO PARALLEL SIDES POSITIONED TOWARD AN OPPOSITE DIRECTION ON SAID SCREEN,
Claim 2
Dependent Claim
127 words
A SCREEN COMPRISING A PLURALITY OF SUBSTANTIALLY SPECULAR FACETS OF GENERALLY TRAPEZOIDAL SHAPE, WITH ONE OF THE PARALLEL SIDES OF SAID TRAPEZOIDS BEING LARGER THAN THE OTHER, SAID FACETS EACH BELONGING TO ONE ONLY OF TWO DISTINCT CLASSES, FACETS OF ONE OF SAID CLASSES HAVING POSITIVE CURVATURE AND FACETS OF THE OTHER OF SAID CLASSES HAVING NEGATIVE CURVATURE, FACETS OF SAID TWO CLASSES BEING INTERMINGLED ON THE FACE OF SAID SCREEN IN ESSENTIALLY CHECKERBOARD FASHION, SAID FACETS BEING SO ORIENTED ON THE FACE OF SAID SCREEN THAT THOSE OF ONE CLASS HAVE THE LONGER OF THEIR PARALLEL SIDES POSITIONED TOWARD ONE DIRECTION ON SAID SCREEN, AND FACETS OF THE OTHER CLASS HAVE THE LONGER OF THEIR TWO PARALLEL SIDES POSITIONED TOWARD AN OPPOSITE DIRECTION ON SAID SCREEN,
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |