US3412206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary differential phase-shift system using only three phase-shift values and one time-shift value
Assignee: Individual
•
Filing: 1965-05-12
•
Granted: 1968-11-19
•
Expires: 1985-05-12
Abstract
No abstract record available.
Inventors
- 👤 Bizet Pierre
- 👤 Oswald Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:54
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/20; H04L27/2032; H04L27/2053; H04L27/206; H04L27/2067; H04L27/2075; H04L27/22; H04L27/233; H04L27/2331
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3128343A
Cited
US3330909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |