US3023673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable magnification afocal lens member
Assignee: Bell and Howell Co
•
Filing: 1958-12-12
•
Granted: 1962-03-06
•
Expires: 1978-12-12
Abstract
No abstract record available.
Inventors
- 👤 Cox Arthur
- 👤 Walter R Linke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:21
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/144; G02B15/1441; G02B15/144109
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE597354C
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US2078586A
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US2179850A
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US2353565A
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US2578574A
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US2663223A
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US2649025A
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US2685229A
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US2859654A
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FR1150483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |