Patent US3302520A successfully refreshed from Google Patents.
US3302520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic slides with sound track
Assignee: AV Corp
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Filing: 1963-11-27
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Granted: 1967-02-07
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Expires: 1983-11-27
Abstract
No abstract record available.
Inventors
- 👤 Panayotis C Dimitracopoulos
- 👤 Constantine D Pezaris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:17
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/06; Y; Y10; Y10S; Y10S40/00; Y10S40/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A UNITARY COMBINED SOUND AND PICTURE-PROJECTION TABLET COMPRISING A RELATIVELY THIN, FLAT SUPPORT CARRYING ON ONE FACE THEREOF A STATIONARY OPEN SPIRAL SOUND TRACK WHOSE RADIAL WIDTH IS SMALL COMPARED WITH THE OUTER RADIUS OF SAID TRACK, AND A PHOTOGRAPHIC PROJECTION TRANSPARENCY SECURED FIXEDLY ON SAID SUPPORT WITH ITS TRANS-
Claim 2
Dependent Claim
50 words
A UNITARY COMBINED SOUND AND PICTURE-PROJECTION TABLET COMPRISING A RELATIVELY THIN, FLAT SUPPORT CARRYING ON ONE FACE THEREOF A STATIONARY OPEN SPIRAL SOUND TRACK WHOSE RADIAL WIDTH IS SMALL COMPARED WITH THE OUTER RADIUS OF SAID TRACK, AND A PHOTOGRAPHIC PROJECTION TRANSPARENCY SECURED FIXEDLY ON SAID SUPPORT WITH ITS TRANS-
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |