Patent US4145300A successfully refreshed from Google Patents.
US4145300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developers containing magnetic particles and a sublimable dyestuff
Assignee: Sublistatic Holding SA
•
Filing: 1976-09-30
•
Granted: 1979-03-20
•
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 15:35
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.
References Cited (Backward Citations)
US3052564A
Cited
US2890968A
Cited
US3377286A
Cited
US3679612A
Cited
US3561003A
Cited
US3627682A
Cited
US3558492A
Cited
US3900318A
Cited
US3941898A
Cited
US3925219A
Cited
DE2452530A1
Cited
FR2253230A1
Cited
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 |