Patent US2155231A successfully refreshed from Google Patents.
US2155231A
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US
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Fan and method of making same
Assignee: General Electric Co
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Filing: 1936-06-01
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Granted: 1939-04-18
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Expires: 1956-06-01
Abstract
No abstract record available.
Inventors
- 👤 Albert B Hubbard
- 👤 Stanton Myles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:31
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/78; F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-04-17 | 1942-10-17 | 1943-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-17 | 1946-10-17 | 1947-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-17 | 1950-10-17 | 1951-04-18 | $7700.00 | Window Closed / Lapsed |