US3264935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-focusing slide projector
Assignee: Individual
•
Filing: 1964-01-06
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Granted: 1966-08-09
•
Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Robert W Vose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:20
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/53
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
AUTOMATIC OPTICAL FOCUSING SYSTEM COMPRISING A PROJECTION LENS, MEANS FOR HOLDING OBJECTS AT THE FOCUSED OBJECT PLANE OF SAID LENS, MEANS INCLUDING A CONCAVE SPHERICAL MIRROR CENTERED AT THE MID-POINT OF SAID FOCUSED OBJECT PLANE FOR SENSING DEVIATIONS IN THE LOCATION OF OBJECTS RELATIVE TO SAID FOCUSED OBJECT PLANE, MEANS FOR GENERATING A SIGNAL WHICH IS A FUNCTION OF SAID DEVIATIONS, AND MEANS FOR RELATIVELY MOVING SAID LENS AND SAID OBJECT HOLDING MEANS TO AUTOMATICALLY CORRECT SAID DEVIATIONS.
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 |