US3549230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zooming device for adjusting the light amount of a formed image
Assignee: Nikon Corp
•
Filing: 1968-02-27
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Granted: 1970-12-22
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Expires: 1988-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jinichi Kato
- 👤 Takashi Tamori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:51
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02; G02B21/025; G02B15/00; G02B15/14; G02B15/144; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G03; G03B; G03B17/00; G03B17/02; G03B17/12; G03B17/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |