US2463859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threaded locking device
Assignee: BOOTS AIRCRAFT NUT Corp
•
Filing: 1945-07-25
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Granted: 1949-03-08
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Expires: 1965-07-25
Abstract
No abstract record available.
Inventors
- 👤 Henry O Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:40
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/02; F16B39/023; F16B19/00; F16B19/04; F16B19/08; F16B19/10; F16B19/1027; F16B19/1036; F16B19/1081; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/954
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1296374A
Cited
FR739089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |