US3257572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stators for polyphase small electric motors
Assignee: Licentia Patent Verwaltungs GmbH
•
Filing: 1960-03-14
•
Granted: 1966-06-21
•
Expires: 1980-03-14
Abstract
No abstract record available.
Inventors
- 👤 Ludemann Joseph
- 👤 Heilmann Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:32
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/146; H02K1/148; H02K17/00; H02K17/02; H02K17/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
STATOR FOR SMALL THREE PHASE MOTORS WITH POLYPHASE WINDING COMPRISING: A YOKE RING; 3 SALIENT POLES PER ELECTRIC POLE PAIR, INWARDLY PROTRUDING FROM SAID RING, THERE BEING M ELECTRIC POLE PAIRS WITH M BEING A POSITIVE INTEGER; AND MAGNETICALLY CONDUCTIVE POLE BRIDGES DISPOSED BETWEEN ADJACENT ONES OF SAID POLES.
Claim 2
Dependent Claim
49 words
STATOR FOR SMALL THREE PHASE MOTORS WITH POLYPHASE WINDING COMPRISING: A YOKE RING; 3 SALIENT POLES PER ELECTRIC POLE PAIR, INWARDLY PROTRUDING FROM SAID RING, THERE BEING M ELECTRIC POLE PAIRS WITH M BEING A POSITIVE INTEGER; AND MAGNETICALLY CONDUCTIVE POLE BRIDGES DISPOSED BETWEEN ADJACENT ONES OF SAID POLES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |