US2380900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction device
Assignee: SK Wellman Corp
•
Filing: 1942-02-26
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Granted: 1945-07-31
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Expires: 1962-02-26
Abstract
No abstract record available.
Inventors
- 👤 Samuel K Wellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:22
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/58; F16D13/60; F16D13/64; F16D65/00; F16D65/02; F16D65/12; F16D65/128; F16D2013/642; F16D2065/13; F16D2065/1304; F16D2065/132; F16D2065/134; F16D2065/1344; F16D65/122
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) | 1948-07-30 | 1949-01-29 | 1949-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-30 | 1953-01-29 | 1953-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-30 | 1957-01-29 | 1957-07-31 | $7700.00 | Window Closed / Lapsed |