US2437659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced impeller structure for wind motors
Assignee: WINCHARGER CORP
•
Filing: 1943-07-19
•
Granted: 1948-03-09
•
Expires: 1963-07-19
Abstract
No abstract record available.
Inventors
- 👤 John R Albers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:07
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/022; F03D7/0224; F03D7/0244; F03D7/0252; F05; F05B; F05B2260/00; F05B2260/70; F05B2260/74; F05B2260/77; F05B2260/90; F05B2260/901; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |