US4448871A
Expired / Lapsed
US
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Toner for developing an electrostatically charged image and manufacturing method thereof
Assignee: Konica Minolta Inc
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Filing: 1981-08-24
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Granted: 1984-05-15
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Expires: 2001-08-24
Abstract
Abstract A process for manufacturing towers and their use in developing an electrostatically charged image comprising polymerized grains formed by the suspension polymerization of an alpha-beta unsaturated polymeric monomer or monomers in the presence of a dispersion stabilizer selected from the group consisting of aluminum hydroxide, ferric hydroxide titanium hydroxide and thorium hydroxide.
Inventors
- 👤 Kiyoshi Tamaki
- 👤 Hideki Murata
- 👤 Sadatugu Terada
- 👤 Tsuneo Wada
- 👤 Akitoshi Matsubara
- 👤 Hiroyuki Takagiwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:57
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09708; G03G9/0802; G03G9/0804; G03G9/0806; G03G9/087; G03G9/08784; G03G9/08793
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A toner for developing an electrostatically charged image comprising polymerized grains formed by the suspension polymerization of an alpha-beta unsaturated polymeric monomer or monomers in the presence of a dispersion stabilizer selected from the group consisting of aluminum hydroxide, ferric hydroxide, titanium hydroxide and thorium hydroxide.
Claim 2
Dependent Claim
46 words
A toner for developing an electrostatically charged image comprising polymerized grains formed by the suspension polymerization of an alpha-beta unsaturated polymeric monomer or monomers in the presence of a dispersion stabilizer selected from the group consisting of aluminum hydroxide, ferric hydroxide, titanium hydroxide and thorium hydroxide.
Claim 3
Dependent Claim
53 words
A process for manufacturing toners for developing an electrostatically charged image comprising suspension polymerizing an alpha-beta unsaturated polymeric monomer or monomers in the presence of an aqueous dispersion of an anionic surface active agent and a dispersion stabilizer selected from the group consisting of aluminum hydroxide, ferric hydroxide, titanium hydroxide and thorium hydroxide.
Claim 4
Dependent Claim
53 words
A process for manufacturing toners for developing an electrostatically charged image comprising suspension polymerizing an alpha-beta unsaturated polymeric monomer or monomers in the presence of an aqueous dispersion of an anionic surface active agent and a dispersion stabilizer selected from the group consisting of aluminum hydroxide, ferric hydroxide, titanium hydroxide and thorium hydroxide.
References Cited (Backward Citations)
US4231919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |