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Patent US3400369A successfully refreshed from Google Patents.
US3400369A
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US
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Pulse doublet communication system
Assignee: Raytheon Co
•
Filing: 1967-05-08
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Granted: 1968-09-03
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Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 David B Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:36
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H03; H03M; H03M1/00; H03M1/12; H03M1/124; H03M1/60; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3133280A
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US3184734A
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US3196430A
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US3209259A
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US3160874A
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US3196351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |