US2643306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Runout detector
Assignee: AT&T Inc
•
Filing: 1950-02-28
•
Granted: 1953-06-23
•
Expires: 1970-02-28
Abstract
No abstract record available.
Inventors
- 👤 James O Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:31
CPC Classifications
B; B65; B65H; B65H63/00; B65H63/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US756303A
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US1627292A
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DE665364C
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US2148665A
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US2249988A
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US2313638A
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US2357675A
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US2419518A
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US2452223A
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US2487187A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |