US3353443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide projector in combination with a sound tape and transparency slide holder
Assignee: Bell and Howell Co
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Filing: 1966-06-03
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Granted: 1967-11-21
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Expires: 1986-06-03
Abstract
No abstract record available.
Inventors
- 👤 Walter J Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:17
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/04; G03B23/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A SLIDE PROJECTION APPARATUS, A SOUND HEAD, A DRIVEN CAPSTAN, MEANS DRIVING THE CAPSTAN, LIGHT PROJECTING MEANS HAVING A LIGHT PATH SPACED FROM THE CAPSTAN, AN ENDLESS SOUND TAPE, A TRANSPARENCY, A SOUND SLIDE HOLDER HOLDING THE TRANSPARENCY AND THE ENDLESS SOUND TAPE, AND A SLIDE-CHANGER FOR MOVING THE HOLDER FROM A RETRACTED POSITION TO A PROJECTION POSITION IN WHICH THE TRANSPARENCY INTERSECTS THE LIGHT PATH AND THE TAPE ENGAGES THE SOUND HEAD AND CAPSTAN, THE SLIDE HOLDER INCLUDING GUIDE MEANS
Claim 2
Dependent Claim
82 words
IN A SLIDE PROJECTION APPARATUS, A SOUND HEAD, A DRIVEN CAPSTAN, MEANS DRIVING THE CAPSTAN, LIGHT PROJECTING MEANS HAVING A LIGHT PATH SPACED FROM THE CAPSTAN, AN ENDLESS SOUND TAPE, A TRANSPARENCY, A SOUND SLIDE HOLDER HOLDING THE TRANSPARENCY AND THE ENDLESS SOUND TAPE, AND A SLIDE-CHANGER FOR MOVING THE HOLDER FROM A RETRACTED POSITION TO A PROJECTION POSITION IN WHICH THE TRANSPARENCY INTERSECTS THE LIGHT PATH AND THE TAPE ENGAGES THE SOUND HEAD AND CAPSTAN, THE SLIDE HOLDER INCLUDING GUIDE MEANS
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |