Patent US5401584A successfully refreshed from Google Patents.
US5401584A
Expired / Lapsed
US
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Surveillance marker and method of making same
Assignee: Sentry Technology Corp
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Filing: 1993-09-10
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Granted: 1995-03-28
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Expires: 2013-09-10
Abstract
Abstract A deactivatable electronic theft detection marker is made from a strip or ribbon of high magnetic permeability strip or ribbon and then high magnetic coercivity material is deposited on the strip or ribbon by electroplating.
Inventors
- 👤 Arthur J. Minasy
- 👤 Peter Y. Zhou
- 👤 Thomas P. Solaski
- 👤 Edward J. Callaghan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:17
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2402; G08B13/2405; G08B13/2408; G08B13/2411; G08B13/2428; G08B13/2437; G08B13/244; G08B13/2442; G08B13/2445; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12465; Y10T428/12493
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A deactivatable electronic article surveillance system marker comprising: an element of easily magnetizable material having high magnetic permeability and low magnetic coercivity such that said material, when subjected to continuous alternating magnetic interrogation fields, will produce characteristic detectable disturbances of those fields; and another magnetizable material which has a higher magnetic coercivity than the material of said element, said another magnetizable material being in direct contact with said element on an atom by atom basis, the interface between said magnetic materials being essentially free of any other materials.
Claim 2
Dependent Claim
88 words
A deactivatable electronic article surveillance system marker comprising: an element of easily magnetizable material having high magnetic permeability and low magnetic coercivity such that said material, when subjected to continuous alternating magnetic interrogation fields, will produce characteristic detectable disturbances of those fields; and another magnetizable material which has a higher magnetic coercivity than the material of said element, said another magnetizable material being in direct contact with said element on an atom by atom basis, the interface between said magnetic materials being essentially free of any other materials.
Claim 3
Dependent Claim
19 words
A deactivatable marker according to claim 1, wherein said another material is electroplated onto the surface of said element.
Claim 4
Dependent Claim
20 words
A deactivatable marker according to claim 1, wherein said another material is vacuum deposited onto the surface of said element.
Claim 5
Dependent Claim
19 words
A deactivatable marker according to claim 1, wherein said another material is sputtered onto the surface of said element.
Claim 6
Dependent Claim
20 words
A deactivatable marker according to claim 1, wherein said another material is arranged at spaced apart locations along said element.
Claim 7
Dependent Claim
32 words
A deactivatable marker according to claim 1, wherein said element is a portion of an elongated strip of said high permeability material and wherein said another material is deposited onto said strip.
Claim 8
Dependent Claim
30 words
A deactivatable marker according to claim 1, wherein said element is a ring shaped member and wherein said another material is deposited at discrete spaced apart locations around said member.
References Cited (Backward Citations)
US3747086A
Cited
US4158434A
Cited
US3820104A
Cited
US4260881A
Cited
US4539558A
Cited
US4686154A
Cited
US4743890A
Cited
US5130698A
Cited
US5146204A
Cited
US5181021A
Cited
US5225807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-27 | 1998-09-26 | 1999-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-27 | 2002-09-26 | 2003-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-27 | 2006-09-26 | 2007-03-28 | $7700.00 | Window Closed / Lapsed |