US3176578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical projection device
Assignee: Individual
•
Filing: 1959-11-20
•
Granted: 1965-04-06
•
Expires: 1979-11-20
Abstract
No abstract record available.
Inventors
- 👤 Bolsey Emil
- 👤 Bolsey Maria
- 👤 Norman W Schur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:39
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/132; Y; Y10; Y10S; Y10S353/00; Y10S353/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN AN OPTICAL PROJECTION DEVICE, IN COMBINATION, OPTICAL MEANS INCLUDING AN OBJECTIVE AND A CONDENSER LENS LOCATED ALONG THE OPTICAL AXIS OF SAID OPTICAL MEANS; MEANS SUPPORTING SAID CONDENSER LENS FOR MOVEMENT ALONG SAID OPTICAL AXIS SO THAT THE POSITION OF SAID CONDENSER LENS IN SAID OPTICAL MEANS CAN BE ADJUSTED; AND MEANS SUPPORTING SAID OBJECTIVE FOR REMOVAL AND REPLACEMENT BY AN OBJECTIVE OF A DIFFERENT FOCAL LENGTH, WHEREBY THE POSITION OF SAID CONDENSER LENS ALONG SAID OPTICAL AXIS MAY BE ADJUSTED IN ACCORDANCE WITH THE FOCAL LENGTH OF THE PARTICULAR OBJECTIVE WHICH IS INCLUDED IN SAID OPTICAL MEANS, SAID MEANS FOR REMOVABLY MOUNTING SAID OBJECTIVE INCLUDING A PAIR OF CHANNEL MEMBERS RECEIVING A PAIR OF DIAMETRICALLY OPPOSED EDGE PORTIONS OF SAID OBJECTIVE.
Claim 2
Dependent Claim
123 words
IN AN OPTICAL PROJECTION DEVICE, IN COMBINATION, OPTICAL MEANS INCLUDING AN OBJECTIVE AND A CONDENSER LENS LOCATED ALONG THE OPTICAL AXIS OF SAID OPTICAL MEANS; MEANS SUPPORTING SAID CONDENSER LENS FOR MOVEMENT ALONG SAID OPTICAL AXIS SO THAT THE POSITION OF SAID CONDENSER LENS IN SAID OPTICAL MEANS CAN BE ADJUSTED; AND MEANS SUPPORTING SAID OBJECTIVE FOR REMOVAL AND REPLACEMENT BY AN OBJECTIVE OF A DIFFERENT FOCAL LENGTH, WHEREBY THE POSITION OF SAID CONDENSER LENS ALONG SAID OPTICAL AXIS MAY BE ADJUSTED IN ACCORDANCE WITH THE FOCAL LENGTH OF THE PARTICULAR OBJECTIVE WHICH IS INCLUDED IN SAID OPTICAL MEANS, SAID MEANS FOR REMOVABLY MOUNTING SAID OBJECTIVE INCLUDING A PAIR OF CHANNEL MEMBERS RECEIVING A PAIR OF DIAMETRICALLY OPPOSED EDGE PORTIONS OF SAID OBJECTIVE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |