Patent US3249006A successfully refreshed from Google Patents.
US3249006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic focusing photographic projector
Assignee: Rollei of America Inc
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Filing: 1964-04-14
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Granted: 1966-05-03
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Expires: 1984-04-14
Abstract
No abstract record available.
Inventors
- 👤 Norman L Stauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:22
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PHOTOGRAPHIC SLIDE PROJECTOR INCLUDING A PROJECTION RADIATION SOURCE, AN OBJECTIVE LENS, OPTICAL MEANS LOCATED ON AN OPTICAL AXIS BETWEEN SAID SOURCE AND SAID LENS AND INCLUDING SLIDE GUIDE MEANS TO POSITION ON SAID AXIS A SLIDE AN IMAGE OF WHICH IS TO BE PROJECTED IN FOCUS BY SAID LENS ONTO A SCREEN OR THE LIKE, FIRST MEANS INCLUDING MEANS TO FORM AN IMAGE OF A RADIATION SOURCE AT THE NORMAL PLANE OF THE SLIDE, SECOND MEANS TO RE-IMAGE THE REFLECTED IMAGE OF THE RADIATION SOURCE AT A POINT UPON DIFFERENTIAL RADIATION-SENSITIVE MEANS RESPONSIVE TO THE POSITION OF SAID RE-IMAGE THEREON, AND THIRD MEANS CONTROLLED BY SAID SENSING MEANS TO
Claim 2
Dependent Claim
110 words
A PHOTOGRAPHIC SLIDE PROJECTOR INCLUDING A PROJECTION RADIATION SOURCE, AN OBJECTIVE LENS, OPTICAL MEANS LOCATED ON AN OPTICAL AXIS BETWEEN SAID SOURCE AND SAID LENS AND INCLUDING SLIDE GUIDE MEANS TO POSITION ON SAID AXIS A SLIDE AN IMAGE OF WHICH IS TO BE PROJECTED IN FOCUS BY SAID LENS ONTO A SCREEN OR THE LIKE, FIRST MEANS INCLUDING MEANS TO FORM AN IMAGE OF A RADIATION SOURCE AT THE NORMAL PLANE OF THE SLIDE, SECOND MEANS TO RE-IMAGE THE REFLECTED IMAGE OF THE RADIATION SOURCE AT A POINT UPON DIFFERENTIAL RADIATION-SENSITIVE MEANS RESPONSIVE TO THE POSITION OF SAID RE-IMAGE THEREON, AND THIRD MEANS CONTROLLED BY SAID SENSING MEANS TO
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |