US4554233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic toner containing triazolium compound as charge controlling agent
Assignee: Ricoh Co Ltd
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Filing: 1983-10-05
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Granted: 1985-11-19
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Expires: 2003-10-05
Abstract
Abstract A toner for developing latent electrostatic images comprising a binder agent and a charge controlling agent of the formula ##STR1## wherein R 1 , R 2 and R 3 independently represent an unsubstituted or substituted aromatic ring, such as an unsubstituted or substituted benzene ring or naphthalene ring; and n is an integer of 0 or 1.
Inventors
- 👤 Mitsuru Hashimoto
- 👤 Toshiyasu Kawabata
- 👤 Toshiki Nanya
- 👤 Hisao Murayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:40
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09758
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
51 words
A toner for developing latent electrostatic images comprising particles composed of a mixture of a colorant, a binder agent and a charge controlling agent of the formula ##STR4## wherein R 1 , R 2 and R 3 independently represent an unsubstituted or substituted aromatic ring; and n is 0 or 1.
Claim 2
Dependent Claim
51 words
A toner for developing latent electrostatic images comprising particles composed of a mixture of a colorant, a binder agent and a charge controlling agent of the formula ##STR4## wherein R 1 , R 2 and R 3 independently represent an unsubstituted or substituted aromatic ring; and n is 0 or 1.
Claim 3
Dependent Claim
19 words
A toner for developing latent electrostatic images as in claim 1, wherein said aromatic ring is a benzene ring.
Claim 4
Dependent Claim
20 words
A toner for developing latent electrostatic images as claimed in claim 1, wherein said aromatic ring is a naphthalene ring.
Claim 5
Dependent Claim
35 words
A toner for developing latent electrostatic images as claimed in claim 1, wherein the content of said charge controlling agent in said toner is in the range of 0.1 wt. % to 10 wt. %.
Claim 6
Dependent Claim
89 words
A toner for developing latent electrostatic images as claimed in claim 1, wherein said binder agent is selected from the group consisting of: (1) polymers and copolymers of the following monomers, and mixtures of the polymers and copolymers: styrene and styrene derivatives, vinyl naphthalene, vinyl chloride, vinyl bromide, vinyl fluoride, vinyl esters, α-methylene aliphatic monocarboxylic acid esters, acrylonitrile, methacrylonitrile, acrylic amide, vinyl ethers, vinyl ketones, and N-vinyl compounds, (2) non-vinyl-type thermoplastic resins, and (3) mixtures of the first mentioned polymers or copolymers and the second mentioned non-vinyl-type thermoplastic resins.
Claim 7
Dependent Claim
22 words
A toner for developing latent electrostatic images as claimed in claim 1, in which said mixture further comprises a magnetic powder-like material.
Claim 8
Dependent Claim
43 words
A toner for developing latent electrostatic images as claimed in claim 6, wherein the content of said magnetic powder-like material in said toner is about 50 to about 300 parts by weight with respect to 100 parts by weight of said binder agent.
Claim 9
Dependent Claim
55 words
A toner for developing latent electrostatic images comprising particles composed of a mixture of a powder of a magnetic material, a binder agent and a charge controlling agent of the formula ##STR5## wherein R 1 , R 2 and R 3 independently represent an unsubstituted or substituted aromatic ring; and n is 0 or 1.
Claim 10
Dependent Claim
55 words
A toner for developing latent electrostatic images comprising particles composed of a mixture of a powder of a magnetic material, a binder agent and a charge controlling agent of the formula ##STR5## wherein R 1 , R 2 and R 3 independently represent an unsubstituted or substituted aromatic ring; and n is 0 or 1.
Claim 11
Dependent Claim
20 words
A toner for developing latent electrostatic images as claimed in claim 8, wherein said aromatic ring is a benzene ring.
Claim 12
Dependent Claim
20 words
A toner for developing latent electrostatic images as claimed in claim 8, wherein said aromatic ring is a naphthalene ring.
Claim 13
Dependent Claim
35 words
A toner for developing latent electrostatic images as claimed in claim 8, wherein the content of said charge controlling agent in said toner is in the range of 0.1 wt. % to 10 wt. %.
Claim 14
Dependent Claim
89 words
A toner for developing latent electrostatic images as claimed in claim 8, wherein said binder agent is selected from the group consisting of: (1) polymers and copolymers of the following monomers, and mixtures of the polymers and copolymers: styrene and styrene derivatives, vinyl naphthalene, vinyl chloride, vinyl bromide, vinyl fluoride, vinyl esters, α-methylene aliphatic monocarboxylic acid esters, acrylonitrile, methacrylontrile, acrylic amide, vinyl ethers, vinyl ketones, and N-vinyl compounds, (2) non-vinyl-type thermoplastic resins, and (3) mixtures of the first mentioned polymers or copolymers and the second mentioned non-vinyl-type thermoplastic resins.
Claim 15
Dependent Claim
22 words
A toner for developing latent electrostatic images as claimed in claim 8, in which said mixture further comprises a pigment or dye.
Claim 16
Dependent Claim
54 words
A toner for developing latent electrostatic images as claimed in claim 8, wherein the content of said magnetic material in said toner is about 50 to about 300 parts by weight with respect to 100 parts by weight of said binder agent and the particle size of said magnetic material is about 0.1-3.0 micrometers.
Claim 17
Dependent Claim
62 words
A toner as claimed in claim 8, which contains about 0.5-5.0 wt. % of said charge controlling agent, the amount of said magnetic material is from 90-200 parts by weight, per 100 parts by weight of said binder agent, said magnetic material has a particle size of about 0.1-3.0 micrometers and said toner particles have a particle size of about 5-20 micrometers.
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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |