Patent US5870673A successfully refreshed from Google Patents.
Patent US3397313A successfully refreshed from Google Patents.
US3397313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for transducing infra-red images into visible images utilizing a liquid light control layer
Assignee: Gretag AG
•
Filing: 1965-06-18
•
Granted: 1968-08-13
•
Expires: 1985-06-18
Abstract
No abstract record available.
Inventors
- 👤 Mast Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:12
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/12; G02B27/00; G02B27/50; H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7425
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |