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Patent US2826117A successfully refreshed from Google Patents.
US2826117A
Expired / Lapsed
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High aperture wide-angle objective for cinematographic cameras
Assignee: Canon Inc
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Filing: 1956-05-23
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Granted: 1958-03-11
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Expires: 1976-05-23
Abstract
No abstract record available.
Inventors
- 👤 Mukai Jiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:44
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1934561A
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US2317790A
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US2324057A
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US2612077A
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US2582085A
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GB741511A
Cited
US2752821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |