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US917005A
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Brush-support for dynamo-electric machines.
Assignee: NORTHERN ELECTRICAL MANUFACTURING Co
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Filing: 1906-10-09
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Granted: 1909-04-06
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Expires: 1926-10-09
Abstract
No abstract record available.
Inventors
- 👤 Walter M Coffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:13
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/02; H02K23/18
Claims Analysis
Total Claims: 0
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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) | 1912-04-05 | 1912-10-05 | 1913-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-04-05 | 1916-10-05 | 1917-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-04-05 | 1920-10-05 | 1921-04-06 | $7700.00 | Window Closed / Lapsed |