Patent US4941687A successfully refreshed from Google Patents.
US4941687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security paper for currency and bank notes
Assignee: Crane and Co Inc
•
Filing: 1989-11-09
•
Granted: 1990-07-17
•
Expires: 2009-11-09
Abstract
Abstract A metallized plastic strip containing security indicia is incorporated 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
2026-11-08 23:29
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: 9
Claim 1
Independent Claim
73 words
A security paper comprising: a sheet of paper having printed indicia on a first surface; a plastic security strip embedded within said paper; a first pigmented material selectively applied to said plastic strip; a plurality of metal characters on said first pigmented material; and a second pigmented material over said metal characters, whereby said metal characters are thereby visible with transmitted light and invisible under reflected light once embedded in said security paper.
Claim 2
Dependent Claim
73 words
A security paper comprising: a sheet of paper having printed indicia on a first surface; a plastic security strip embedded within said paper; a first pigmented material selectively applied to said plastic strip; a plurality of metal characters on said first pigmented material; and a second pigmented material over said metal characters, whereby said metal characters are thereby visible with transmitted light and invisible under reflected light once embedded in said security paper.
Claim 3
Dependent Claim
17 words
The security paper of claim 1 including second printed indicia on a second surface of said paper.
Claim 4
Dependent Claim
16 words
The security paper of claim 1 wherein first said pigmented material comprises a selectively soluble resin.
Claim 5
Dependent Claim
15 words
The security paper of claim 1 wherein said metal characters comprise a caustic soluble metal.
Claim 6
Dependent Claim
12 words
The security paper of claim 1 wherein said paper comprises currency paper.
Claim 7
Dependent Claim
13 words
The security paper of claim 1 wherein said printed indicia comprises currency denomination.
Claim 8
Dependent Claim
18 words
The security paper of claim 1 including a coating of light transmissive plastic over said second pigmented material.
Claim 9
Dependent Claim
16 words
The security paper of claim 1 wherein said second pigmented material comprises a selectively soluble resin.
References Cited (Backward Citations)
US2435889A
Cited
US2558504A
Cited
US2506164A
Cited
US3935334A
Cited
US4186943A
Cited
US4242378A
Cited
US4462867A
Cited
US4398994A
Cited
US4652015A
Cited
US4761205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |