US2492115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retainer washer device
Assignee: Illinois Tool Works Inc
•
Filing: 1945-06-25
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Granted: 1949-12-20
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Expires: 1965-06-25
Abstract
No abstract record available.
Inventors
- 👤 Edmond C Crowther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
F; F16; F16B; F16B41/00; F16B41/002; F16B21/00; F16B21/10; F16B21/16; F16B43/00; Y; Y10; Y10S; Y10S411/00; Y10S411/918; Y10S411/999; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918; Y10T29/49925; Y10T29/49934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |