Patent US2538582A successfully refreshed from Google Patents.
US2441239A
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Blower apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1944-01-29
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Granted: 1948-05-11
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Expires: 1964-01-29
Abstract
No abstract record available.
Inventors
- 👤 Warren B Flanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:46
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; F04D29/545; F04D29/547
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1762358A
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US1892303A
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GB368160A
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US1954193A
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US2130910A
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US2085909A
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US2169232A
Cited
US2211671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |