US1821487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making friction blocks
Assignee: AMERICAN BRAKE MATERIALS Corp
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Filing: 1928-12-03
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Granted: 1931-09-01
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Expires: 1948-12-03
Abstract
No abstract record available.
Inventors
- 👤 James S Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:18
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/04; F16D69/0416; B; B29; B29C; B29C43/00; B29C43/02; B29C43/18; B29C70/00; B29C70/68; B29C70/78; B29L; B29L2031/00; B29L2031/748; B29L2031/7482
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) | 1934-08-31 | 1935-03-02 | 1935-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-31 | 1939-03-02 | 1939-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-31 | 1943-03-02 | 1943-09-01 | $7700.00 | Window Closed / Lapsed |