Patent US2448825A successfully refreshed from Google Patents.
US2448825A
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US
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Turbine rotor
Assignee: Lockheed Martin Corp
•
Filing: 1944-03-20
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Granted: 1948-09-07
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Expires: 1964-03-20
Abstract
No abstract record available.
Inventors
- 👤 Nathan C Price
- 👤 Harold A Greenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:01
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3061; F01D5/02; F01D5/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321
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) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |