US2793541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: M J JOHNSON AIRCRAFT ENGINEERI
•
Filing: 1953-05-11
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Granted: 1957-05-28
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Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Walter O Borcherdt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
G; G05; G05G; G05G5/00; G05G5/06; G05G2700/00; G05G2700/04; G05G2700/08; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20576; Y10T74/20636; Y10T74/20642; Y10T74/20672; Y10T74/20678; Y10T74/20924; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1323661A
Cited
US1064608A
Cited
US1471730A
Cited
US1740725A
Cited
US1774738A
Cited
GB475164A
Cited
US2435037A
Cited
FR991748A
Cited
US2641395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |