Patent US2831133A successfully refreshed from Google Patents.
US2831133A
Expired / Lapsed
US
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High frequency alternator field winding
Assignee: Louis Allis Co
•
Filing: 1954-09-22
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Granted: 1958-04-15
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Expires: 1974-09-22
Abstract
No abstract record available.
Inventors
- 👤 Hansen Hans Richard Ansgar
- 👤 Jr William J Bradburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:25
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/12; H02K3/16
Claims Analysis
Total Claims: 0
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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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |