US2586540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torsion meter
Assignee: AT&T Inc
•
Filing: 1948-02-26
•
Granted: 1952-02-19
•
Expires: 1968-02-26
Abstract
No abstract record available.
Inventors
- 👤 William H T Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:30
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/02; G01L3/04; G01L3/10; G01L3/12; G01L3/109
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1685964A
Cited
US1721375A
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US2136223A
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US2050866A
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US2077220A
Cited
US2176935A
Cited
US2313923A
Cited
US2346976A
Cited
US2402719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |