US1300239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator-brush.
Assignee: Westinghouse Electric Corp
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Filing: 1916-03-25
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Granted: 1919-04-15
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Expires: 1936-03-25
Abstract
No abstract record available.
Inventors
- 👤 Charles B Berst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:28
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/38; H01R39/39
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) | 1922-04-14 | 1922-10-14 | 1923-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-04-14 | 1926-10-14 | 1927-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-04-14 | 1930-10-14 | 1931-04-15 | $7700.00 | Window Closed / Lapsed |