Patent US2589741A successfully refreshed from Google Patents.
US2589741A
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US
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Elements per unit length counter mechanism
Assignee: AT&T Inc
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Filing: 1950-04-13
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Granted: 1952-03-18
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Expires: 1970-04-13
Abstract
No abstract record available.
Inventors
- 👤 Henry C Slechta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:37
CPC Classifications
G; G06; G06M; G06M7/00; G06M1/00; G06M1/08; G06M1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1451281A
Cited
DE424917C
Cited
US1924624A
Cited
GB396417A
Cited
US2122710A
Cited
US2415854A
Cited
US2543790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |