US2947466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axial flow fans
Assignee: KONINK MACHINENFABRIEK Gebr ST
•
Filing: 1957-07-22
•
Granted: 1960-08-02
•
Expires: 1977-07-22
Abstract
No abstract record available.
Inventors
- 👤 Jan C Busquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:08
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F04D29/362; F04D29/40; F04D29/52; F04D29/54; F04D29/56; F04D29/563
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB309135A
Cited
US2314572A
Cited
US2397060A
Cited
US2393042A
Cited
GB606560A
Cited
US2645410A
Cited
DE838193C
Cited
GB671607A
Cited
GB702312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |