Patent US2884001A successfully refreshed from Google Patents.
Patent US2305810A successfully refreshed from Google Patents.
US2305810A
Expired / Lapsed
US
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Regulating device for height aircraft engines with two compressors
Assignee: Individual
•
Filing: 1939-02-03
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Granted: 1942-12-22
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Expires: 1959-02-03
Abstract
No abstract record available.
Inventors
- 👤 Muller Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:37
CPC Classifications
F; F02; F02D; F02D9/00; F04; F04D; F04D17/00; F04D17/08; F04D17/10; F04D17/12; F04D25/00; F04D25/02; F04D25/024; F04D27/00; F04D27/02; F04D27/0253; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0246; F04D29/00; F04D29/58; F04D29/582; F04D29/5826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-12-21 | 1946-06-22 | 1946-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-21 | 1950-06-22 | 1950-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-21 | 1954-06-22 | 1954-12-22 | $7700.00 | Window Closed / Lapsed |