US2720119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction surface articles having high degree of wear resistance
Assignee: Individual
•
Filing: 1951-10-17
•
Granted: 1955-10-11
•
Expires: 1971-10-17
Abstract
No abstract record available.
Inventors
- 👤 Russel J Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:31
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/14; F16H55/16; Y; Y10; Y10S; Y10S29/00; Y10S29/023; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49705; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19963; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1472147A
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US1358190A
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US1524555A
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US1978985A
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US2353194A
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US2276143A
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US2383194A
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US2397626A
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US2553590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |