Patent US2249923A successfully refreshed from Google Patents.
US2249923A
Expired / Lapsed
US
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Screw and nut fastening
Assignee: Guest Keen and Nettlefolds Ltd
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Filing: 1940-09-03
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Granted: 1941-07-22
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Expires: 1960-09-03
Abstract
No abstract record available.
Inventors
- 👤 Whitcombe Christopher John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:52
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/04; F16B37/045; Y; Y10; Y10S; Y10S220/00; Y10S220/03; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/966; Y10S411/971
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) | 1944-07-21 | 1945-01-20 | 1945-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-21 | 1949-01-20 | 1949-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-21 | 1953-01-20 | 1953-07-22 | $7700.00 | Window Closed / Lapsed |