US3414728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared modulators and detectors employing single crystal te or se
Assignee: AT&T Inc
•
Filing: 1965-12-23
•
Granted: 1968-12-03
•
Expires: 1985-12-23
Abstract
No abstract record available.
Inventors
- 👤 Chandra K N Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:07
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/0009; G02F1/0036; G02F1/01; G02F1/03; G02F1/09; G02F2/00
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |