Patent US6233222B1 successfully refreshed from Google Patents.
US3401340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diversity receiver with revertive action to a preferred selection
Assignee: AT&T Inc
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Filing: 1965-03-03
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Granted: 1968-09-10
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Expires: 1985-03-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Claude I L Cronburg
- 👤 Harold T King
- 👤 Joseph W Knapp
- 👤 Frederick M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0805; H04B7/0814; H04B7/12
Claims Analysis
Total Claims: 0
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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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |