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US3453434A
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Infrared ray detector utilizing ferroelectric single crystal
Assignee: Hitachi Ltd
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Filing: 1968-10-22
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Granted: 1969-07-01
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Expires: 1988-10-22
Abstract
No abstract record available.
Inventors
- 👤 Katsumi Takami
- 👤 Yahiko Yamada
- 👤 Kyo Suda
- 👤 Masashi Koga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/34
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |