US2439933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal blower
Assignee: Westinghouse Electric Corp
•
Filing: 1943-07-28
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Granted: 1948-04-20
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Expires: 1963-07-28
Abstract
No abstract record available.
Inventors
- 👤 Charles F Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:33
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/282; F04D25/00; F04D25/02; F04D25/06; F04D25/0606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE338436C
Cited
US2201867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |