Patent US3506929A successfully refreshed from Google Patents.
US3506929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Litao3 electro-optic modulator
Assignee: AT&T Inc
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Filing: 1967-02-13
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Granted: 1970-04-14
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Expires: 1987-02-13
Abstract
No abstract record available.
Inventors
- 👤 Albert A Ballman
- 👤 Richard T Denton
- 👤 Pascal V Lenzo
- 👤 Edward G Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:29
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/01; G02F1/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |