US2693025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making commutators
Assignee: FREDERICK J DURRSCHMIDT
•
Filing: 1950-03-17
•
Granted: 1954-11-02
•
Expires: 1970-03-17
Abstract
No abstract record available.
Inventors
- 👤 John E Driscoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:48
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011; Y10T407/00; Y10T407/16; Y10T407/1614; Y10T83/00; Y10T83/02; Y10T83/0333
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US166337A
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US539022A
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US1274411A
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US2145091A
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US2233928A
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US2230639A
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US2303106A
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US2379584A
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US2557308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |