US3244944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnet for electric brakes
Assignee: ZF Active Safety US Inc
•
Filing: 1962-05-28
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Granted: 1966-04-05
•
Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 William T Birge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:23
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D2121/00; F16D2121/18; F16D2121/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
AN ELECTROMAGNET COMPRISING A PLASTIC COIL FORM HAVING AN ANNULAR, RADIALLY OUTWARDLY FACING CAVITY AXIALLY DEFINED BY AXIALLY SPACED RADIALLY EXTENDING, ANNULAR INNER AND OUTER FACE PORTIONS, A COIL ANNULARLY WOUND WITHIN SAID CAVITY, A MAGNET BODY HAVING AN ANNULAR, AXIALLY FACING RECESS IN A FRONTAL FACE THEREOF, SAID COIL FORM WITH SAID COIL LOCATED IN SAID RECESS, AND MEANS INCLUDING AN AXIALLY OUTWARDLY FACING FRICTION MEMBER SECURED AT SAID FRONTAL FACE ON SAID MAGNET BODY AXIALLY RETAINING SAID COIL FORM,
Claim 2
Dependent Claim
81 words
AN ELECTROMAGNET COMPRISING A PLASTIC COIL FORM HAVING AN ANNULAR, RADIALLY OUTWARDLY FACING CAVITY AXIALLY DEFINED BY AXIALLY SPACED RADIALLY EXTENDING, ANNULAR INNER AND OUTER FACE PORTIONS, A COIL ANNULARLY WOUND WITHIN SAID CAVITY, A MAGNET BODY HAVING AN ANNULAR, AXIALLY FACING RECESS IN A FRONTAL FACE THEREOF, SAID COIL FORM WITH SAID COIL LOCATED IN SAID RECESS, AND MEANS INCLUDING AN AXIALLY OUTWARDLY FACING FRICTION MEMBER SECURED AT SAID FRONTAL FACE ON SAID MAGNET BODY AXIALLY RETAINING SAID COIL FORM,
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |