US3606528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-viewing station
Assignee: Bell and Howell Co
•
Filing: 1969-09-23
•
Granted: 1971-09-20
•
Expires: 1989-09-23
Abstract
Abstract A NOVEL PRE-VIEWING STATION IN A SLIDE PROJECTOR THAT FACILITATES REMOVAL AND INSERTION FROM THE STATION. THE SLIDES WHEN PRESENT AT THE PRE-VIEWING STATION ARE ORIENTED IN A HORIZONTAL PLANE AND VIEWED FROM THE NORMAL OPERATING POSITION ARE IN THE SAME ORIENTATION AS WHEN PROJECTED.
Inventors
- 👤 Carl C Costanza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:51
CPC Classifications
G; G03; G03B; G03B23/00
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |