US3498193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure meter for measuring the illumination of image area
Assignee: Nikon Corp
•
Filing: 1967-05-18
•
Granted: 1970-03-03
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Expires: 1987-05-18
Abstract
No abstract record available.
Inventors
- 👤 Jun Shimomura
- 👤 Shigeo Ono
- 👤 Takashi Kageura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:19
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09971; G03B7/09977; G03B7/09976
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1128983A
Cited
US3100429A
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US3163097A
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US3080803A
Cited
US3291017A
Cited
US3264964A
Cited
US3324776A
Cited
FR1419387A
Cited
US3327600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |