US3716831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Worn brake indicator
Assignee: Individual
•
Filing: 1971-03-23
•
Granted: 1973-02-13
•
Expires: 1991-03-23
Abstract
Abstract A CONTACT SWITCH ASSEMBLY MOUNTED TO A BRAKE DRUM AND CONNECTED TO A WARNING LIGHT PANEL FOR INDICATION OF BRAKE WEAR WHEN THE BRAKE LINING WEARS TO A POINT WHERE THE CONTROL SWITCH ASSEMBLY IS EXPOSED TO THE BRAKE DRUM. D R A W I N G
Inventors
- 👤 J Rikard
- 👤 B Rikard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:14
CPC Classifications
F; F16; F16D; F16D66/00; F16D66/02; F16D66/021; F16D66/022; F16D66/023; F16D66/024
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |