US2715080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact brush
Assignee: General Electric Co
•
Filing: 1954-05-27
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Granted: 1955-08-09
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Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 John G Cashell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:17
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/18; H01R39/20; H01B; H01B1/00; H01B1/04; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A CARBON BRUSH FOR ELECTRICAL PURPOSES CONTAINING FROM ABOUT 1% TO 5% BY WEIGHT OF AN ALKALI METAL PYROPHOSPHATE.
Claim 2
Dependent Claim
19 words
A CARBON BRUSH FOR ELECTRICAL PURPOSES CONTAINING FROM ABOUT 1% TO 5% BY WEIGHT OF AN ALKALI METAL PYROPHOSPHATE.
References Cited (Backward Citations)
US504105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |