US2551858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistor type of isolator for lightining arresters
Assignee: McGraw Electric Co
•
Filing: 1949-08-22
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Granted: 1951-05-08
•
Expires: 1969-08-22
Abstract
No abstract record available.
Inventors
- 👤 Herman O Stoelting
- 👤 Joseph F Kuzela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:00
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2118795A
Cited
US1967616A
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US2174477A
Cited
US2315320A
Cited
US2283685A
Cited
US2305436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |