US2555997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding contact of electric machines
Assignee: Mersen SA
•
Filing: 1947-06-16
•
Granted: 1951-06-05
•
Expires: 1967-06-16
Abstract
No abstract record available.
Inventors
- 👤 Porail Fernand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:20
CPC Classifications
H; H02; H02K; H02K13/00; H02K13/006; H01; H01R; H01R39/00; H01R39/64; H01R39/646
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US393422A
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US885278A
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US916694A
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US903257A
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US1059304A
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US1145926A
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US1655717A
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US2205688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |