US3211831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic focus control system and method
Assignee: Goodyear Aerospace Corp
•
Filing: 1963-05-31
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Granted: 1965-10-12
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 Wilford L Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/36; H; H04; H04N; H04N23/00; H04N23/60; H04N23/67
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
IN AN AUTOMATIC FOCUS CONTROL SYSTEM UTILIZING CONVENTIONAL FOCUS MEANS THE COMBINATION OF MEANS TO CORRELATE TWO IDENTICAL FOCUSED IMAGES TO ACHIEVE A CORRELATION SIGNAL, MEANS TO CORRELATE TWO IMAGES FOCUSED IDENTICALLY AT AT DIFFERENT FOCUS THAN SAID FIRST IDENTICAL IMAGES TO ACHIEVE A SECOND CORRELATION SIGNAL, MEANS TO COMPARE THE SECOND CORRELATION SIGNAL TO SAID FIRST CORRELATION SIGNAL, AND MEANS TO CONTROL THE FOCUS MEANS IN RESPONSE TO THE COMPARISON OF SAID SECOND CORRELATION SIGNAL AND SAID FIRST CORRELATION SIGNAL.
References Cited (Backward Citations)
US2838600A
Cited
US2999436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |