US2591408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-ventilated dynamoelectric machine having an air cleaner
Assignee: General Electric Co
•
Filing: 1949-09-03
•
Granted: 1952-04-01
•
Expires: 1969-09-03
Abstract
No abstract record available.
Inventors
- 👤 John H Crankshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:15
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/26; Y; Y10; Y10S; Y10S55/00; Y10S55/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1530645A
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US1620241A
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US1745950A
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DE627213C
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US2182862A
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US2087789A
Cited
GB539188A
Cited
US2327197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |