Patent US3028084A successfully refreshed from Google Patents.
US3028084A
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US
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Reversible counting relay chain
Assignee: AT&T Inc
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Filing: 1958-09-11
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Granted: 1962-04-03
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Expires: 1978-09-11
Abstract
No abstract record available.
Inventors
- 👤 Philip H Weatherill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:43
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2008909A
Cited
GB468040A
Cited
US2417831A
Cited
US2636078A
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US2775726A
Cited
US2768334A
Cited
US2883588A
Cited
US2831635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |