US3504153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of spark machining stator or rotor having lamination simulating characteristics
Assignee: Lloyd Dynamowerke GmbH
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Filing: 1966-10-11
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Granted: 1970-03-31
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Expires: 1986-10-11
Abstract
No abstract record available.
Inventors
- 👤 Hartwig Beyersdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:11
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K15/00; H02K15/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US729655A
Cited
US3200231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |