US2648520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooled turbine blade
Assignee: Individual
•
Filing: 1949-08-02
•
Granted: 1953-08-11
•
Expires: 1969-08-02
Abstract
No abstract record available.
Inventors
- 👤 Heinz E Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:50
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49339; Y10T29/49341
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE346599C
Cited
GB190122028A
Cited
US1550185A
Cited
US1893330A
Cited
US1966104A
Cited
GB584580A
Cited
US2440069A
Cited
US2520373A
Cited
US2448315A
Cited
GB602530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |