Patent US5282894A successfully refreshed from Google Patents.
US5282894A
Expired / Lapsed
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Use of a liquid containing IR dyes as printing ink
Assignee: BASF SE
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Filing: 1993-01-25
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Granted: 1994-02-01
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Expires: 2013-01-25
Abstract
Abstract A liquid useful as printing ink contains one or more dyes with their absorption maximum within the range from 700 to 1200 nm selected from the phthalocyanines, the naphthalocyanines, the nickel-dithiolene complexes, the aminium compounds of aromatic amines, the methine dyes or the azulenesquaric acid dyes, as well as solvent and binder.
Inventors
- 👤 Bernhard Albert
- 👤 Friedrich Closs
- 👤 Juergen Kipper
- 👤 Walter Kurtz
- 👤 Karin H. Beck
- 👤 Rudolf Griebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:28
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A method of printing a substrate, comprising printing said substrate by intaglio, letterpress or flexographic printing with a liquid printing ink comprising a solvent, binder and one or more dyes having an adsorption maximum of from 700 to 1200 nm, said dyes being: a. metal-free phthalocyanines, b. phthalocyanines complexed with two lithium atoms, or with magnesium, zinc, copper or nickel as central atoms, c. metal-free naphthalocyanines, d. naphthalocyanines complexed with two lithium atoms, or with magnesium, zinc, copper or nickel as central atoms, e. nickel-dithiolene complexes, f. aminimum compounds of aromatic amines, or g. methine dyes, or h. azulenesquaric acid dyes.
Claim 2
Independent Claim
101 words
A method of printing a substrate, comprising printing said substrate by intaglio, letterpress or flexographic printing with a liquid printing ink comprising a solvent, binder and one or more dyes having an adsorption maximum of from 700 to 1200 nm, said dyes being: a. metal-free phthalocyanines, b. phthalocyanines complexed with two lithium atoms, or with magnesium, zinc, copper or nickel as central atoms, c. metal-free naphthalocyanines, d. naphthalocyanines complexed with two lithium atoms, or with magnesium, zinc, copper or nickel as central atoms, e. nickel-dithiolene complexes, f. aminimum compounds of aromatic amines, or g. methine dyes, or h. azulenesquaric acid dyes.
Claim 3
Dependent Claim
30 words
The method of printing according to claim 1, wherein said one or more dyes are present in the liquid printing ink in an amount of 0.001 to 15% by weight.
Claim 4
Dependent Claim
17 words
The method of printing according to claim 1, wherein said one or more dyes comprise metal-free phthalocyanines.
Claim 5
Dependent Claim
31 words
The method of printing according to claim 1, wherein said one or more dyes comprise phthalocyanines complexed with two lithium atoms, or with magnesium, zinc, copper or nickel as central atoms.
Claim 6
Dependent Claim
17 words
The method of printing according to claim 1, wherein said one or more dyes comprises metal-free naphthalocyanines.
Claim 7
Dependent Claim
31 words
The method of printing according to claim 1, wherein said one or more dyes comprise naphthalocyanines complexed with two lithium atoms, or with magnesium, zinc, copper or nickel as central atoms.
Claim 8
Dependent Claim
17 words
The method of printing according to claim 1, wherein said one or more dyes comprise nickel-dithiolene complexes.
Claim 9
Dependent Claim
20 words
The method of printing according to claim 1, wherein said one or more dyes comprise aminimum compounds of aromatic amines.
Claim 10
Dependent Claim
17 words
The method of printing according to claim 1, wherein said one or more dyes comprise methine dyes.
Claim 11
Dependent Claim
18 words
The method of printing according to claim 1, wherein said one or more dyes are azulenesquaric acid dyes.
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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) | 1997-01-31 | 1997-08-02 | 1998-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-31 | 2001-08-02 | 2002-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-31 | 2005-08-02 | 2006-02-01 | $7700.00 | Window Closed / Lapsed |