US2531644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential drive assembly for article-handling devices
Assignee: AT&T Inc
•
Filing: 1945-08-14
•
Granted: 1950-11-28
•
Expires: 1965-08-14
Abstract
No abstract record available.
Inventors
- 👤 Vincent A Rayburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:38
CPC Classifications
F; F16; F16H; F16H37/00; F16H2700/00; F16H2700/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US314207A
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US584577A
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GB190929672A
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US1147417A
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US1518592A
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US1906831A
Cited
US2296868A
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US2171994A
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US2249873A
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US2356590A
Cited
US2356160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |