Patent US2725697A successfully refreshed from Google Patents.
US2725697A
Expired / Lapsed
US
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Process for seating the brushes on an electric commutator
Assignee: Individual
•
Filing: 1953-11-02
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Granted: 1955-12-06
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Expires: 1973-11-02
Abstract
No abstract record available.
Inventors
- 👤 Walter D Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:27
CPC Classifications
B; B24; B24B; B24B1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2226553A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |