Patent US3618174A successfully refreshed from Google Patents.
US3618174A
Expired / Lapsed
US
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Magnetic fastener
Assignee: Individual
•
Filing: 1970-02-04
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Granted: 1971-11-09
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Expires: 1990-02-04
Abstract
Abstract A QUICK DETACHABLE FASTENER FOR ATTACHING ARTICLES TO SHEET MATERIAL HAS AN ANNULAR RING MAGNET AND ARMATURE WITH A CENTRALLY DISPOSED GUIDE POST FOR MATING WITH THE ANNULAR RING TO MAINTAIN THE ARMATURE AND MAGNET RING IN PROPER ALIGNMEMT, AND A CLAMP ATTACHED TO THE ARMATURE FOR SECURING THERETO AN ARTICLE TO BE MOUNTED, THE SHEET MATERIAL BEING HELD BETWEEN THE ARMATURE AND MAGNET BY THE MAGNETIC ATTRACTION THEREBETWEEN.
Inventors
- 👤 Herbert Schainholz
- 👤 Peter Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:09
CPC Classifications
A; A41; A41F; A41F1/00; A41F1/002; H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252; H01F7/0263; Y; Y10; Y10T; Y10T24/00; Y10T24/32; Y10T24/34; Y10T24/3484; Y10T24/3485; Y10T24/3489
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |