US2420475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction composition and method of preparing the same
Assignee: Individual
•
Filing: 1942-01-10
•
Granted: 1947-05-13
•
Expires: 1962-01-10
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Greger
- 👤 Southwick W Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:00
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB145052A
Cited
GB233907A
Cited
US1828211A
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US1932912A
Cited
US2001194A
Cited
US1962577A
Cited
US2161290A
Cited
US2218058A
Cited
US2351641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |