Patent US3473636A successfully refreshed from Google Patents.
US3473636A
Expired / Lapsed
US
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Water cooled flexible brake shoe including friction materials of different braking characteristics
Assignee: Motors Liquidation Co
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Filing: 1968-04-01
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Granted: 1969-10-21
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Expires: 1988-04-01
Abstract
No abstract record available.
Inventors
- 👤 Darrel R Sand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:32
CPC Classifications
F; F16; F16D; F16D51/00; F16D51/46; F16D51/48; F16D51/16; F16D51/18; F16D51/20; F16D51/24; F16D65/00; F16D65/78; F16D65/82; F16D65/833; F16D69/00; F16D2069/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |