US4925215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concealed magnetic indicia
Assignee: Action Drive Thru Inc
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Filing: 1989-06-12
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Granted: 1990-05-15
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Expires: 2009-06-12
Abstract
Abstract A paper token upon which there is printed an indicia in a first ink which contains iron oxide particles and which indicia is overprinted with a second ink not containing magnetic particles. The first and second inks are dissolvable by the same solvent and the two inks are physically bonded together.
Inventors
- 👤 Martin S. Klaiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:43
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/06187; B; B41; B41M; B41M3/00; B41M3/14; Y; Y10; Y10S; Y10S283/00; Y10S283/904
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
99 words
A magnetically coded token comprising: (a) a sheet of non-magnetic substrate; (b) a first layer of spaced indicia on said substrate formed with an ink containing particles of iron oxide; (c) a second opaque layer of iron oxide-free ink overlying, concealing and bonded to said first layer; and, (d) the ink of said first layer being I.P.I. Magnetic Black PL 401 and the ink of said second layer being Dence Black MSP 34220S; and, (e) said layers being so connected that said second layer cannot be removed without at least partially destroying said spaced indicia of said first layer.
Claim 2
Dependent Claim
99 words
A magnetically coded token comprising: (a) a sheet of non-magnetic substrate; (b) a first layer of spaced indicia on said substrate formed with an ink containing particles of iron oxide; (c) a second opaque layer of iron oxide-free ink overlying, concealing and bonded to said first layer; and, (d) the ink of said first layer being I.P.I. Magnetic Black PL 401 and the ink of said second layer being Dence Black MSP 34220S; and, (e) said layers being so connected that said second layer cannot be removed without at least partially destroying said spaced indicia of said first layer.
Claim 3
Dependent Claim
13 words
A token as defined by claim 1 in which said substrate is paper.
References Cited (Backward Citations)
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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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |