Patent US3264936A successfully refreshed from Google Patents.
US3264936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead projection stage for transparencies
Assignee: Tecnifax Corp
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Filing: 1964-06-17
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Granted: 1966-08-09
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Expires: 1984-06-17
Abstract
No abstract record available.
Inventors
- 👤 Bennett V Schultz
- 👤 Robert F Beliveau
- 👤 Earl S Stahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:21
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/132
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
ACCESSORY FOR DISPLAYING TRANSPARENCIES ON AN OVERHEAD PROJECTOR COMPRISING A FRAME PANEL, MEANS FOR RELEASABLY ATTACHING SAID PANEL ON THE STAGE OF AN OVERHEAD PROJECTOR, MEANS FOR REGISTERING TRANSPARENCIES IN SUPERPOSED RELATION OVER SAID FRAME PANEL, A SHELF PANEL HINGEDLY CONNECTED TO SAID FRAME PANEL AND SWINGABLE IN SUPERPOSED AND COPLANAR RELATION, AND MEANS FOR RELEASABLY RETAINING SAID SHELF PANEL IN GENERALLY COPLANAR RELATION ADJACENT SAID FRAME PANEL WHEN THE LATTER IS MOUNTED ON THE STAGE OF THE OVERHEAD PROJECTOR, SAID RETAINING MEANS INCLUDING A FLEXIBLE FLAP FOR AT LEAST PARTIALLY ENCLOSING SAID ACCESSORY WHEN REMOVED FROM THE STAGE OF THE OVERHEAD PROJECTOR.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |