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US2831057A
Expired / Lapsed
US
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Automatic focus adjuster
Assignee: TDK Micronas GmbH
•
Filing: 1952-09-22
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Granted: 1958-04-15
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Expires: 1972-09-22
Abstract
No abstract record available.
Inventors
- 👤 Richard K Orthuber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:50
CPC Classifications
G; G03; G03B; G03B3/00; G03B19/00; G03B19/18; H; H04; H04N; H04N23/00; H04N23/60; H04N23/67; H04N3/00; H04N3/10; H04N3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2134757A
Cited
US2403628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |