Filmstrip viewing box
Abstract
Abstract THIS SPECIFICATION DISCLOSES A COLLAPSIBLE FLAT-FOLDING VIEWING BOX FOR USE WITH FILM TRANSPARENCIES ARRANGED IN THE FORM OF A FILMSTRIP, THE FILMSTRIP BEING SLIDABLY ENGAGED AT ONE END OF THE BOX AND ADAPTED TO BE MOVED TO AND FRO TO BRING INDIVIDUAL TRANSPARENCIES INTO REGISTRATION WITH AN ILLUMINATED VIEWING WINDOW, AND THE BOX IS FURTHER PROVIDED WITH AN OPTICAL VIEWING OPENING SPACED FROM THE VIEWING WINDOW AND HAVING A VIEWING LENS THEREIN, THE BOX EXCLUDING SUBSTANTIALLY ALL OF THE AMBIENT LIGHT WHICH MIGHT OTHERWISE FALL ON THE LENS, AND IN THIS WAY, THE IMAGE OF THE TRANSPARENCY CAN BE VIEWED OPTICALLY AT ITS MAXIMUM BRILLIANCE, AND THE STRIP CAN BE MOVED TO AND FRO TO SELECT DIFFERENT TRANSPARENCIES. THE BOX IS COLLAPSIBLE AND MADE OF RELATIVELY INEXPENSIVE MATERIAL SO AS TO ENABLE IT TO BE FOLDED FLAT AND MAILED OUT FOR ADVERTISING PURPOSES AND THE LIKE.
Inventors
- 👤 Cyril Fitz-James Redford
- 👤 Joseph Drewitt Brown
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |