Patent US2645732A successfully refreshed from Google Patents.
US2645732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator
Assignee: Union Carbide Corp
•
Filing: 1953-03-23
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Granted: 1953-07-14
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Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Paul A Marsal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:49
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/04; H01R39/045; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A COMMUTATOR COMPRISING A BUSHING, AN INSULATING CORE OF A HEAT-HARDENED EPOXY RESIN, AND CARBON COMMUTATOR SEGMENTS, ONE END OF SID SEGMENTS BEING DISPOSED IN ELECTRICAL CONTACT WITH
Claim 2
Dependent Claim
28 words
A COMMUTATOR COMPRISING A BUSHING, AN INSULATING CORE OF A HEAT-HARDENED EPOXY RESIN, AND CARBON COMMUTATOR SEGMENTS, ONE END OF SID SEGMENTS BEING DISPOSED IN ELECTRICAL CONTACT WITH
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |