US2438866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller mounting
Assignee: RTX Corp
•
Filing: 1945-06-01
•
Granted: 1948-03-30
•
Expires: 1965-06-01
Abstract
No abstract record available.
Inventors
- 👤 Albert M Rockwell
- 👤 Albert H Beaufrere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:41
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/266; F01; F01D; F01D5/00; F01D5/02; F01D5/025; F02; F02B; F02B33/00; F02M; F02M2700/00; F02M2700/33; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10S; Y10S29/00; Y10S29/035; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/53; Y10T29/53687; Y10T403/00; Y10T403/70; Y10T403/7047; Y10T403/7051
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1973554A
Cited
US2222787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |