Patent US3059532A successfully refreshed from Google Patents.
US3059532A
Expired / Lapsed
US
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Optical system
Assignee: Bell and Howell Co
•
Filing: 1959-01-12
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Granted: 1962-10-23
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Expires: 1979-01-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas I Harris
- 👤 Irving C Sandback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:40
CPC Classifications
G; G02; G02B; G02B15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2184018A
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US2169130A
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US2366597A
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US2387497A
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US2394635A
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US2433438A
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US2803167A
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US2913956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |