US2450982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamoelectric machine
Assignee: EDWARD F ANDREWS
•
Filing: 1942-07-22
•
Granted: 1948-10-12
•
Expires: 1962-07-22
Abstract
No abstract record available.
Inventors
- 👤 William J O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:10
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/146; H02K1/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US433701A
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GB158013A
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US1735222A
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US1770905A
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US1823601A
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US1910473A
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US1895356A
Cited
US2072894A
Cited
US1913179A
Cited
US2078805A
Cited
US2160076A
Cited
US2128544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |