US2524361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction motor control
Assignee: AO Smith Corp
•
Filing: 1945-12-20
•
Granted: 1950-10-03
•
Expires: 1965-12-20
Abstract
No abstract record available.
Inventors
- 👤 Sr Marion B Sawyer
- 👤 Chester K Reigel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:31
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/34; H02K17/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US413984A
Cited
US514903A
Cited
US905713A
Cited
US1144012A
Cited
GB294966A
Cited
US1893112A
Cited
US2151460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |