US3565733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin flexible lenticular screen unit
Assignee: Individual
•
Filing: 1967-06-29
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Granted: 1971-02-23
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Expires: 1987-06-29
Abstract
Abstract A THIN FLEXIBLE LENTICULAR SCREEN UNIT INCLUDING A PLASTIC SCREEN HAVING ASPHERICALLY CURVED LENTICLES FORMED ON THE FORWARD SURFACE THEREOF AND A BACKING SHEET ADHERED TO THE REARWARD SURFACE THEREOF. THE LENTICLES OF THE SCREEN ARE SPACED APART FROM ONE ANOTHER BY A PREDETERMINED DISTANCE AND THE VIEWING ANGLE OF EACH LENTICLE IS MAXIMIZED.
Inventors
- 👤 Sam L Leach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:18
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/0006; G02B3/0012; G02B3/0031; G02B3/0037; G02B3/005; G03; G03B; G03B35/00; G03B35/18; G03B35/24; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/2457
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |