Patent US2380889A successfully refreshed from Google Patents.
US2380889A
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Polyengine bipropeller drive
Assignee: Individual
•
Filing: 1942-07-14
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Granted: 1945-07-31
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Expires: 1962-07-14
Abstract
No abstract record available.
Inventors
- 👤 Waseige Charles Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:52
CPC Classifications
B; B64; B64D; B64D35/00; B64D35/04; B64D35/06; B64D35/08; F; F16; F16H; F16H1/00; F16H1/02; F16H1/20; F16H1/22; F16H1/222; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0806; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19014
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) | 1948-07-30 | 1949-01-29 | 1949-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-30 | 1953-01-29 | 1953-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-30 | 1957-01-29 | 1957-07-31 | $7700.00 | Window Closed / Lapsed |