US3561860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viewing apparatus
Assignee: Individual
•
Filing: 1969-05-16
•
Granted: 1971-02-09
•
Expires: 1989-05-16
Abstract
Abstract AN ENCLOSED VIEWING APPARATUS HAVING A CABINET AND A SCREEN POSITIONED ON ONE SIDE THEREOF, AND AN EXTENDED PORTION ABOUT THE SCREEN AREA HAVING A RECESSED PORTION UNDER THE SCREEN, THE SCREEN BEING PROVIDED WITH A LIGHT FILTER POSITIONED AT THE EXTENDED PORTION TO TAKE AWAY THE GLARE THAT MAY COME FROM THE SCREEN HAVING MEANS WITHIN THE ENCLOSURE FOR REFLECTING IMAGES UPON THE SCREEN AT PREDETERMINED INTERVALS.
Inventors
- 👤 Leonard F Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:02
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |