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Patent US2457525A successfully refreshed from Google Patents.
US2457525A
Expired / Lapsed
US
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Capacity brush holder
Assignee: RCA Corp
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Filing: 1945-04-12
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Granted: 1948-12-28
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Expires: 1965-04-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:02
CPC Classifications
H; H02; H02K; H02K11/00; H02K11/02; H02K11/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |