US2421387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot air turbine power plant with automatic air supply control
Assignee: Ljungstroms Angturbin AB
•
Filing: 1943-04-02
•
Granted: 1947-06-03
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Expires: 1963-04-02
Abstract
No abstract record available.
Inventors
- 👤 Lysholm Alf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:32
CPC Classifications
F; F02; F02C; F02C1/00; F02C1/04; F02C1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB126940A
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GB498882A
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US2394253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |