US2722645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage changer switch for a. c. motor
Assignee: Brown Brockmeyer Co
•
Filing: 1952-02-07
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Granted: 1955-11-01
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Expires: 1972-02-07
Abstract
No abstract record available.
Inventors
- 👤 Steffen S Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:33
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/54; H01H19/56; H01H19/58; H01H9/00; H01H9/0005; H01H9/0011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1069661A
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US1589744A
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US1955756A
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US2100426A
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US2230536A
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US2256181A
Cited
US2321999A
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US2422339A
Cited
US2460415A
Cited
US2485399A
Cited
US2445434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |