Patent US2551864A successfully refreshed from Google Patents.
US2551864A
Expired / Lapsed
US
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Method of coating and impregnating an electrical device
Assignee: McGraw Electric Co
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Filing: 1947-07-14
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Granted: 1951-05-08
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Expires: 1967-07-14
Abstract
No abstract record available.
Inventors
- 👤 Martin I Zwelling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:10
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B05D7/00; B05D7/14; B05D7/16; B05D7/50; B05D7/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US833580A
Cited
US1827571A
Cited
US2154057A
Cited
US2421652A
Cited
US2414525A
Cited
US2434492A
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 |