Patent US3474527A successfully refreshed from Google Patents.
US3474527A
Expired / Lapsed
US
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Method of treating insulation of electric machines
Assignee: Siemens AG
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Filing: 1966-03-25
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Granted: 1969-10-28
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Expires: 1986-03-25
Abstract
No abstract record available.
Inventors
- 👤 Hartmut Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:07
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/421; H01B3/425; H02; H02K; H02K15/00; H02K15/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2611930A
Cited
US2632211A
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US2675421A
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US2707204A
Cited
US2970936A
Cited
US3222626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |