US2936948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axial blower with cone-shaped hub
Assignee: Individual
•
Filing: 1955-07-08
•
Granted: 1960-05-17
•
Expires: 1975-07-08
Abstract
No abstract record available.
Inventors
- 👤 Eck Bruno Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:08
CPC Classifications
F; F04; F04D; F04D19/00; F04D19/002; F04D29/00; F04D29/26; F04D29/32; F04D29/325; F04D29/329
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US907591A
Cited
US1762358A
Cited
US1926113A
Cited
US2108703A
Cited
US2592471A
Cited
US2761617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |