US2518919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact brush
Assignee: Union Carbide Corp
•
Filing: 1949-01-06
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Granted: 1950-08-15
•
Expires: 1969-01-06
Abstract
No abstract record available.
Inventors
- 👤 Earl L Mckinstry
- 👤 Charles M Roseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:36
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/36
Claims Analysis
Total Claims: 0
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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) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |