US2999443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical filter compensation means coupled to exposure-responsive device
Assignee: Yashica Co Ltd
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Filing: 1959-12-01
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Granted: 1961-09-12
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Expires: 1979-12-01
Abstract
No abstract record available.
Inventors
- 👤 Miyauchi Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:12
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/18
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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |