US2052808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backing for composition friction elements
Assignee: AMERICAN BRAKEBLOK Corp
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Filing: 1934-12-11
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Granted: 1936-09-01
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Expires: 1954-12-11
Abstract
No abstract record available.
Inventors
- 👤 Ray E Spokes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:33
CPC Classifications
D; D03; D03D; D03D13/00; D03D13/006; F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; F16D69/022; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3065; Y10T442/3073; Y10T442/3179
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) | 1939-09-01 | 1940-03-02 | 1940-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-09-01 | 1944-03-02 | 1944-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-09-01 | 1948-03-02 | 1948-09-01 | $7700.00 | Window Closed / Lapsed |