Patent US2731371A successfully refreshed from Google Patents.
US2731371A
Expired / Lapsed
US
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Electrical contact brush
Assignee: Union Carbide Corp
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Filing: 1952-03-29
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Granted: 1956-01-17
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Expires: 1972-03-29
Abstract
No abstract record available.
Inventors
- 👤 Ramadanoff Dimiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:19
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/18; H01R39/20; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
AN ELECTRICAL CONTACT BRUSH COMPRISING AT LEAST ONE OF THE MATERIALS IN THE GROUP CONSISTING OF CARBON AND GRAPHITE, AND COUMARONE-INDENE RESIN.
Claim 2
Dependent Claim
22 words
AN ELECTRICAL CONTACT BRUSH COMPRISING AT LEAST ONE OF THE MATERIALS IN THE GROUP CONSISTING OF CARBON AND GRAPHITE, AND COUMARONE-INDENE RESIN.
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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |