Patent US2739254A successfully refreshed from Google Patents.
US2739254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current collecting means for dynamoelectric machines
Assignee: Westinghouse Electric Corp
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Filing: 1954-06-30
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Granted: 1956-03-20
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Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 Lawrence E Moberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:18
CPC Classifications
H; H02; H02K; H02K13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN A DYNAMOELECTRIC MACHINE, A ROTATABLE CURRENT COLLECTING MEMBER, AND A CARBON BRUSH ENGAGING THE CURRENT COLLECTING MEMBER, SAID BRUSH CONTAINING FROM 1% TO 3% BY WIEGHT OF NON-HYGROSCOPIC METAL HALIDE AND SAID CURRENT COLLECTING MEMBER BEING MADE OF AN ALLOY OF COPPER SAID NICKEL CONTAINING FROM 15% TO 45% NICKEL.
Claim 2
Dependent Claim
51 words
IN A DYNAMOELECTRIC MACHINE, A ROTATABLE CURRENT COLLECTING MEMBER, AND A CARBON BRUSH ENGAGING THE CURRENT COLLECTING MEMBER, SAID BRUSH CONTAINING FROM 1% TO 3% BY WIEGHT OF NON-HYGROSCOPIC METAL HALIDE AND SAID CURRENT COLLECTING MEMBER BEING MADE OF AN ALLOY OF COPPER SAID NICKEL CONTAINING FROM 15% TO 45% NICKEL.
References Cited (Backward Citations)
US2414514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |