US3376443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator and method of making
Assignee: Borg Warner Corp
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Filing: 1961-11-30
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Granted: 1968-04-02
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Expires: 1981-11-30
Abstract
No abstract record available.
Inventors
- 👤 Mccoll John Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:19
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/06; H01R43/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
AS AN ARTICLE OF MANUFACTURE FOR THE CONSTRUCTION OF A COMMUTATOR HAVING A PLURALITY OF PERIPHERAL ELECTRICALLY SEPARATED PORTIONS OF ELECTRICAL CONDUCTIVE MATERIAL PROVIDED WITH ANCHORING MEANS EMBEDDED IN AN INSULATING INTERIOR CORE; A STRIP OF SHEET MATERIAL FOLLOWING A CYLINDRICAL CURVATURE AND HAVING ON ITS INWARDLY FACING SURFACE A PLURALITY OF ELONGATED PARALLEL RIBS INTEGRAL WITH SAID SHEET MATERIAL AND FOLLOWING ANNULAR PATHS AND HAVING SIDE SURFACES FORMING AN ACUTE ANGLE WITH THE INTERIOR SURFACE OF SAID CYLINDRICAL MEMBER, AND TOOTH-LIKE IMPRESSIONS IN THE INTERIOR SURFACE OF SAID CYLINDRICAL STRIP BETWEEN SAID RIBS SUBSTANTIALLY PERPENDICULAR TO SAID RIBS.
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) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |