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US2870357A
Expired / Lapsed
US
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Dynamoelectric machine
Assignee: Allis Chalmers Corp
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Filing: 1955-11-30
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Granted: 1959-01-20
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Expires: 1975-11-30
Abstract
No abstract record available.
Inventors
- 👤 Howard L Vandenberg
- 👤 Peter M Karsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:24
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |