Patent US2690820A successfully refreshed from Google Patents.
US2690820A
Expired / Lapsed
US
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Variable density brake lining
Assignee: Old Carco LLC
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Filing: 1950-01-21
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Granted: 1954-10-05
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Expires: 1970-01-21
Abstract
No abstract record available.
Inventors
- 👤 Oscar M Raes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:34
CPC Classifications
F; F16; F16D; F16D69/00; F16D2069/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB176786A
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US1572301A
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FR610902A
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US1805501A
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US1672486A
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US1919542A
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US1930779A
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US2135126A
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US2067086A
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US2201191A
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US2355419A
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US2495045A
Cited
US2476588A
Cited
US2418719A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |