US3405370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal optical modulator
Assignee: AT&T Inc
•
Filing: 1964-06-30
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Granted: 1968-10-08
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Expires: 1984-06-30
Abstract
No abstract record available.
Inventors
- 👤 Ivan P Kaminow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/107; H01S3/1075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3229223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |