US4145300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developers containing magnetic particles and a sublimable dyestuff
Assignee: Sublistatic Holding SA
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Filing: 1976-09-30
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Granted: 1979-03-20
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Expires: 1996-09-30
Abstract
Abstract Developers containing a polymer and at least one sublimable or vaporizable dyestuff which, at atmospheric pressure, passes into the vapor state at between 100° and 220° C., and characterized in that they consist of particles containing a mixture of at least one polymer with a plasticizer or a wax, which release the vapors of said dyestuff if heated at the sublimation or vaporization temperature of said dyestuff, and process for their preparation.
Inventors
- 👤 Dieter Hendriks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:50
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09775; G03G9/083; G03G9/087; G03G9/08775; G03G9/08777; G03G9/08782; G03G9/09; G03G9/0906; G03G9/0908; G03G9/091; G03G9/0914; G03G9/0926
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
86 words
A developer in the form of a dry free-flowing powder containing magnetic particles embedded in a mixture of a polymer and between 2.5 and 25% of at least one sublimable or vaporisable dyestuff which, at atmospheric pressure, passes into the vapour state at between 100° and 200° C, and consisting of particles containing particles of magnetic material in a mixture of at least one polymer with a wax, which release the vapors of said dyestuff if heated at the sublimation or vaporisation temperature of said dyestuff.
Claim 2
Dependent Claim
86 words
A developer in the form of a dry free-flowing powder containing magnetic particles embedded in a mixture of a polymer and between 2.5 and 25% of at least one sublimable or vaporisable dyestuff which, at atmospheric pressure, passes into the vapour state at between 100° and 200° C, and consisting of particles containing particles of magnetic material in a mixture of at least one polymer with a wax, which release the vapors of said dyestuff if heated at the sublimation or vaporisation temperature of said dyestuff.
Claim 3
Dependent Claim
25 words
A developer according to claim 1, characterised in that at least one polymer contained in the particles exhibits affinity for the sublimable or vaporisable dyestuff.
Claim 4
Dependent Claim
63 words
A developer according to claim 2, characterised in that the polymer exhibiting affinity for the sublimable or vaporisable dyestuff is a member selected from the group consisting of a polyester, a polyamide, an epoxy resin, an etherified polysaccharide, an acrylic resin, a polyolefine, a copolymer carrying units corresponding to these homopolymers and a mixture of polymers containing one of these polymers or copolymers.
Claim 5
Dependent Claim
19 words
A developer according to claim 3, characterised in that the polymer exhibiting a dyestuff affinity is a cellulose ether.
Claim 6
Dependent Claim
17 words
A developer according to claim 3, characterised in that the polymer exhibiting a dyestuff affinity is ethylcellulose.
Claim 7
Dependent Claim
19 words
A developer according to claim 1, characterised in that the magnetic material consists of iron or iron oxide granules.
Claim 8
Dependent Claim
18 words
A developer according to claim 1, characterised in that the polymer exhibiting a dyestuff affinity is a polystyrene.
Claim 9
Dependent Claim
29 words
A developer according to claim 1, characterised in that the mixture of at least one polymer with a wax contains at least 5% and at most 85% of wax.
Claim 10
Dependent Claim
14 words
A developer according to claim 1, characterised in that they contain a montan wax.
Claim 11
Dependent Claim
27 words
A developer according to claim 1, characterised in that they contain an ester of the acid C 27 H 55 COOH with ceryl alcohol or myricyl alcohol.
Claim 12
Dependent Claim
20 words
A developer according to claim 1, characterised in that they contain at least one sublimable cationic dyestuff or disperse dyestuff.
Claim 13
Dependent Claim
29 words
A developer according to claim 1, characterised in that they contain at least one hydroxyquinophthalone or a dyestuff containing at least two substituents which are different from one another.
Claim 14
Dependent Claim
21 words
A developer according to claim 14, characterised in that they contain at least one of the following dyestuffs: 3'-hydroxyquinophthalone or 1-amino-4-hydroxy-2-(-methoxy)-ethoxy-anthraquinone.
Claim 15
Dependent Claim
16 words
A developer according to claim 1, characterised in that they contain very fine silicon oxide powder.
Claim 16
Dependent Claim
14 words
A developer according to claim 1, characterised in that they contain carbon black powder.
Claim 17
Dependent Claim
14 words
A developer according to claim 1, characterised in that they contain an antistatic agent.
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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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |