US3180212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide projector with movable gate for editing purposes
Assignee: Argus Inc
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Filing: 1961-11-06
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Granted: 1965-04-27
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Expires: 1981-11-06
Abstract
No abstract record available.
Inventors
- 👤 Clarence G Hillegonds
- 👤 Pester William Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:26
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/04; G03B23/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A SLIDE PROJECTOR HAVING AN OPTICAL TRAIN FOR PROJECTING AN IMAGE OF A TRANSPARENT SLIDE, THE COMBINATION INCLUDING A GATEFOR SUPPORTING A SLIDE, MEANS FOR SUPPORTING SAID GATE FOR MOVEMENT BETWEEN A FIRST POSITION WHERE THE SLIDE SUPPORTED BY THE GATE IS OPPOSITE THE OPTICAL TRAIN IN A PROJECTING POSITION AND IN A SECOND POSITION WHERE THE SLIDE IN THE GATE CAN BE MANUALLY REMOVED FROM THE GATE AND A SLIDE MANUALLY INSERTED INTO THE GATE, MEANS FOR MOVING SAID GATE BETWEEN SAID FIRST AND SECOND POSITIONS, THE TRANSFER MEANS FOR MOVING A SLIDE FROM A SUPPLY OF SLIDES TO THE GATE AND FOR RETURNING THE SLIDE FROM THE GATE TO THE SUPPLY WHEN THE GATE IS IN SAID FIRST POSITION.
Claim 2
Dependent Claim
122 words
IN A SLIDE PROJECTOR HAVING AN OPTICAL TRAIN FOR PROJECTING AN IMAGE OF A TRANSPARENT SLIDE, THE COMBINATION INCLUDING A GATEFOR SUPPORTING A SLIDE, MEANS FOR SUPPORTING SAID GATE FOR MOVEMENT BETWEEN A FIRST POSITION WHERE THE SLIDE SUPPORTED BY THE GATE IS OPPOSITE THE OPTICAL TRAIN IN A PROJECTING POSITION AND IN A SECOND POSITION WHERE THE SLIDE IN THE GATE CAN BE MANUALLY REMOVED FROM THE GATE AND A SLIDE MANUALLY INSERTED INTO THE GATE, MEANS FOR MOVING SAID GATE BETWEEN SAID FIRST AND SECOND POSITIONS, THE TRANSFER MEANS FOR MOVING A SLIDE FROM A SUPPLY OF SLIDES TO THE GATE AND FOR RETURNING THE SLIDE FROM THE GATE TO THE SUPPLY WHEN THE GATE IS IN SAID FIRST POSITION.
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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |