Patent US4661854A successfully refreshed from Google Patents.
Patent US5002636A successfully refreshed from Google Patents.
US5002636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security paper for currency and bank notes
Assignee: Individual
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Filing: 1990-05-29
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Granted: 1991-03-26
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Expires: 2010-05-29
Abstract
Abstract A metallized plastic strip containing security indicia is incorporated within within currency paper to deter counterfeiting. The plastic strip is made difficult to detect under reflected light by selective pigmentation to match the currency inks. The presence of the security indicia is verified by detection under transmitted light.
Inventors
- 👤 Timothy T. Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:27
CPC Classifications
G; G07; G07D; G07D7/00; G07D7/06; G07D7/12; B; B42; B42D; B42D25/00; B42D25/30; B42D25/355; D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/44
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
80 words
A method of making security paper comprising the steps of: providing a strip of plastic material; applying a soluble pigmented material on said plastic strip; applying a layer of metal over said soluble pigmented material; printing over said metal with an insoluble pigmented material to provide printed indicia; removing said metal and said soluble pigmented material from said plastic strip except from under said printed indicia to form a security thread; and embedding said security thread in a colored paper.
Claim 2
Independent Claim
80 words
A method of making security paper comprising the steps of: providing a strip of plastic material; applying a soluble pigmented material on said plastic strip; applying a layer of metal over said soluble pigmented material; printing over said metal with an insoluble pigmented material to provide printed indicia; removing said metal and said soluble pigmented material from said plastic strip except from under said printed indicia to form a security thread; and embedding said security thread in a colored paper.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said security paper comprises currency paper.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said soluble pigmented material comprises a selectively soluble resin.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein said indicia comprises currency denomination.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein said insoluble pigmented material comprises a colored tint.
Claim 7
Dependent Claim
16 words
The method of claim 1 including the step of printing currency indicia on said currency paper.
Claim 8
Dependent Claim
13 words
The method of claim 5 wherein said colored tint matches said colored paper.
Claim 9
Dependent Claim
28 words
The method of claim 1 including the step of applying a protective plastic material over said security thread prior to embedding said security thread in said colored paper.
Claim 10
Independent Claim
71 words
A method of making security paper comprising the steps of: providing a plastic strip; coating said plastic strip with a soluble pigmented material; applying a metal layer over said pigmented material; applying an insoluble pigmented material over said metal layer; dissolving said metal except from under said insoluble pigmented material to form a security thread having metal characters coated with said insoluble pigmented material; and embedding said security thread in paper.
Claim 11
Independent Claim
71 words
A method of making security paper comprising the steps of: providing a plastic strip; coating said plastic strip with a soluble pigmented material; applying a metal layer over said pigmented material; applying an insoluble pigmented material over said metal layer; dissolving said metal except from under said insoluble pigmented material to form a security thread having metal characters coated with said insoluble pigmented material; and embedding said security thread in paper.
Claim 12
Dependent Claim
15 words
The method of claim 9 wherein dissolving said metal comprises demetallization within a caustic solution.
Claim 13
Dependent Claim
20 words
The method of claim 9 wherein said plastic strip is free of said pigmented material except under said metal characters.
Claim 14
Dependent Claim
20 words
The method of claim 9 wherein said security thread is incorporated within said paper during dewatering of a paper slurry.
Claim 15
Dependent Claim
26 words
The method of claim 9 including the step of applynig a protective plastic material over said secuirty thread prior to embedding said security thread in paper.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |