Patent US2838600A successfully refreshed from Google Patents.
US2838600A
Expired / Lapsed
US
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Focusing adjusting system
Assignee: TDK Micronas GmbH
•
Filing: 1952-09-22
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Granted: 1958-06-10
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Expires: 1972-09-22
Abstract
No abstract record available.
Inventors
- 👤 Hans W Salinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:16
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |