US2427731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamoelectric machine ventilation
Assignee: Westinghouse Electric Corp
•
Filing: 1944-06-14
•
Granted: 1947-09-23
•
Expires: 1964-06-14
Abstract
No abstract record available.
Inventors
- 👤 Lynn Clarence
- 👤 Dillon B Hoover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:46
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/02; H02K9/04; H02K9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US923673A
Cited
DE372328C
Cited
US1577303A
Cited
US1684168A
Cited
US1778036A
Cited
US1883288A
Cited
GB321393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-22 | 1951-03-24 | 1951-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-22 | 1955-03-24 | 1955-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-22 | 1959-03-24 | 1959-09-23 | $7700.00 | Window Closed / Lapsed |