US2639357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current limiting apparatus
Assignee: Individual
•
Filing: 1951-12-05
•
Granted: 1953-05-19
•
Expires: 1971-12-05
Abstract
No abstract record available.
Inventors
- 👤 Kesselring Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:51
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/02; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/20; H01H77/00; H01H77/02; H01H77/06; H01H9/00; H01H9/54; H01H9/56
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) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |