Patent US2894239A successfully refreshed from Google Patents.
US2894239A
Expired / Lapsed
US
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Brush mechanism
Assignee: General Electric Co
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Filing: 1955-06-06
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Granted: 1959-07-07
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Expires: 1975-06-06
Abstract
No abstract record available.
Inventors
- 👤 Herman W Schaffer
- 👤 Speicher William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:24
CPC Classifications
B; B60; B60M; B60M5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1070102A
Cited
US1090887A
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US1268293A
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US1594055A
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US1802957A
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US2073830A
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US2242273A
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US2711519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |