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Patent US2890333A successfully refreshed from Google Patents.
US2890333A
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Assignee: AT&T Inc
•
Filing: 1955-08-19
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Granted: 1959-06-09
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Expires: 1975-08-19
Abstract
No abstract record available.
Inventors
- 👤 Manvel K Zinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:58
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/14; H04B3/146; H04B3/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2351934A
Cited
US2273143A
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US2692334A
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US2456029A
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US2594104A
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US2532534A
Cited
US2658958A
Cited
US2662178A
Cited
GB715158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |