US2643852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed turbine
Assignee: United States Department of the Air Force
•
Filing: 1950-01-09
•
Granted: 1953-06-30
•
Expires: 1970-01-09
Abstract
No abstract record available.
Inventors
- 👤 Hans T Holzwarth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
CPC Classifications
F; F01; F01D; F01D1/00; F01D1/02; F01D1/026; Y; Y10; Y10S; Y10S415/00; Y10S415/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US802122A
Cited
US800684A
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GB190409417A
Cited
US821051A
Cited
US911577A
Cited
US1047918A
Cited
US2308233A
Cited
US2334249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |