Patent US2528470A successfully refreshed from Google Patents.
US2528470A
Expired / Lapsed
US
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Speed reducer
Assignee: AO Smith Corp
•
Filing: 1946-04-13
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Granted: 1950-10-31
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Expires: 1966-04-13
Abstract
No abstract record available.
Inventors
- 👤 Irvin L Elder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:02
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0406; F16H13/00; F16H13/06; F16H13/08; F16H57/048; F16H57/0487
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1585140A
Cited
US1713194A
Cited
US1949920A
Cited
US2051886A
Cited
US1958756A
Cited
US2152797A
Cited
GB550234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |