US4554232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic toner
Assignee: Proterial Ltd
•
Filing: 1980-09-23
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Granted: 1985-11-19
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Expires: 2000-09-23
Abstract
Abstract A magnetic toner containing a resin which is obtained by the reaction of a compound containing epoxy radical with an amino-silane compound.
Inventors
- 👤 Kazunori Tabaru
- 👤 Takafumi Aoyama
- 👤 Toshio Kumakura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:32
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08773; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/104
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
55 words
A magnetic toner of the single component type comprising magnetic particles and a resin, wherein said resin comprises at least 5% by weight based on the total weight of resin, of epoxy resin cross-linked with about 0.2 to 7.2% by weight, based on the weight of the epoxy resin, of a primary or secondary aminosilane.
Claim 2
Dependent Claim
55 words
A magnetic toner of the single component type comprising magnetic particles and a resin, wherein said resin comprises at least 5% by weight based on the total weight of resin, of epoxy resin cross-linked with about 0.2 to 7.2% by weight, based on the weight of the epoxy resin, of a primary or secondary aminosilane.
Claim 3
Dependent Claim
73 words
A magnetic toner according to claim 4 in which the aminosilane compound is represented by the formula: ##STR2## wherein R 1 , R 1 ', R 1 ", R 4 and R 4 ' are independently H or an alkyl radical containing less than 3 carbon atoms, and R 2 and R 3 are independently a radical comprised of hydrocarbon containing a saturated or double bond and having 1 to 6 carbon atoms.
Claim 4
Dependent Claim
38 words
A magnetic toner according to claim 1 wherein the aminosilane has the formula: ##STR3## where R 1 , R 1 ', and R 1 ", are independently H or an alkyl radical containing less than 3 carbon atoms.
Claim 5
Dependent Claim
63 words
A magnetic toner of the single component type comprising magnetic particles and a resin, wherein said resin comprises at least 5% by weight based on the total weight of resin, of epoxy resin cross-linked with 0.2 to 7.2% by weight, based on the weight of the epoxy resin, of am aminosilane selected from the group consisting of N-β-aminoethyl-γ-aminopropyl methyl-dimethoxysilane, N-β-methylaminoethyl-γ-aminopropyl methyl-dimethoxysilane, N-β-ethylaminoethyl-γ-aminopropyl methyl-dimethoxysilane.
Claim 6
Dependent Claim
63 words
A magnetic toner of the single component type comprising magnetic particles and a resin, wherein said resin comprises at least 5% by weight based on the total weight of resin, of epoxy resin cross-linked with 0.2 to 7.2% by weight, based on the weight of the epoxy resin, of am aminosilane selected from the group consisting of N-β-aminoethyl-γ-aminopropyl methyl-dimethoxysilane, N-β-methylaminoethyl-γ-aminopropyl methyl-dimethoxysilane, N-β-ethylaminoethyl-γ-aminopropyl methyl-dimethoxysilane.
Claim 7
Dependent Claim
17 words
A magnetic toner according to claims 1 or 4 wherein the magnetic particles comprise particles of magnetite.
Claim 8
Dependent Claim
17 words
A magnetic toner according to claims 1 or 4 wherein the magnetic particles comprise particles of iron.
Claim 9
Dependent Claim
15 words
A magnetic toner according to claims 1 or 4 further comprising a pigment or dyestuff.
Claim 10
Dependent Claim
13 words
A magnetic toner according to claims 1 or 4 further comprising black carbon.
References Cited (Backward Citations)
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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) | 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 |