US2469458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade form for supercharger impellers
Assignee: RTX Corp
•
Filing: 1945-09-24
•
Granted: 1949-05-10
•
Expires: 1965-09-24
Abstract
No abstract record available.
Inventors
- 👤 Norman A Dunnells
- 👤 Robert E Gorton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:20
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/30; F04D29/305; F04D29/284; F04D29/285
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |