US3513341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnet rotor for an electric machine
Assignee: Individual
•
Filing: 1967-03-31
•
Granted: 1970-05-19
•
Expires: 1987-03-31
Abstract
No abstract record available.
Inventors
- 👤 Jean Louis Gratzmuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:04
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/2713
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2212192A
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US2315408A
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US2704231A
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US2651733A
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US3119941A
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US3181018A
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US3206623A
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US3218494A
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US3303369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |