US2444227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller drive
Assignee: RTX Corp
•
Filing: 1944-12-14
•
Granted: 1948-06-29
•
Expires: 1964-12-14
Abstract
No abstract record available.
Inventors
- 👤 Hasbrouck John Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:55
CPC Classifications
B; B64; B64D; B64D27/00; F; F16; F16H; F16H61/00; F16H61/02; F16H61/0262; F16H2708/00; F16H2708/02; F16H2708/06; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18216; Y10T74/18224; Y10T74/19; Y10T74/19219; Y10T74/19284; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19433; Y10T74/19442; Y10T74/19451; Y10T74/1946
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1046440A
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US1720989A
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US1898190A
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US1935965A
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US2276862A
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US2360976A
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US2397883A
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US2402343A
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US2398407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |