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Patent US3492519A successfully refreshed from Google Patents.
US3492519A
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Commutator and commutator blank for dynamoelectric machines and method of making same
Assignee: KIRKWOOD COMMUTATOR CORP
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Filing: 1967-09-11
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Granted: 1970-01-27
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Expires: 1987-09-11
Abstract
No abstract record available.
Inventors
- 👤 William P Kirkwood
- 👤 Robert H Boyer
- 👤 Earl V Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:22
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/06; H01R43/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12208; Y10T428/12229; Y10T428/12271
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1994062A
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US2038419A
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US2535824A
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US2634495A
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US2602988A
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US3251120A
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US3102965A
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US3223869A
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US3376443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |