Patent US2445661A successfully refreshed from Google Patents.
US2445661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axial flow turbine, compressor and the like
Assignee: Metropolitan Vickers Electrical Co Ltd
•
Filing: 1944-01-13
•
Granted: 1948-07-20
•
Expires: 1964-01-13
Abstract
No abstract record available.
Inventors
- 👤 Constant Hayne
- 👤 Merchant Wilfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:00
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/24; F01D25/246; F01D25/16; F01D25/162; F01D9/00; F01D9/02; F01D9/04; F01D9/042; F05; F05B; F05B2230/00; F05B2230/60; F05B2230/604; F05B2230/606; F05D; F05D2230/00; F05D2230/60; F05D2230/64; F05D2230/642
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) | 1951-07-20 | 1952-01-19 | 1952-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-20 | 1956-01-19 | 1956-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-20 | 1960-01-19 | 1960-07-20 | $7700.00 | Window Closed / Lapsed |