US2648557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring retainer ring
Assignee: United States Steel Corp
•
Filing: 1950-07-21
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Granted: 1953-08-11
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Expires: 1970-07-21
Abstract
No abstract record available.
Inventors
- 👤 Sr Robert G Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:09
CPC Classifications
F; F16; F16B; F16B21/00; F16B21/10; F16B21/16; F16B21/18; F16C; F16C35/00; F16C35/04; F16C35/06; F16C19/00; F16C19/22; F16C19/34; F16C19/36; F16C19/364; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US734171A
Cited
US1043298A
Cited
US1362215A
Cited
US1652272A
Cited
US1844463A
Cited
US2026454A
Cited
US2476586A
Cited
US2382948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |