US4565766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing powder
Assignee: Canon Inc
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Filing: 1984-07-20
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Granted: 1986-01-21
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Expires: 2004-07-20
Abstract
Abstract A developing powder comprises a binder containing 50% by weight or more of a polymer having a gel content of 10% or less and prepared from a vinyl type monomer and a crosslinking agent monomer contained in an amount of 0.01-10% by weight based on the total weight of the monomers, and 0.1-5% by weight of an olefin homopolymer or copolymer having a melt viscosity at 140° C. of 10-10 6 cps.
Inventors
- 👤 Yasuo Mitsuhashi
- 👤 Masaki Uchiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:10
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08784; G03G9/08793
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
An electrophotographic process comprising developing a latent image on a latent image supporting member with a toner, transferring the toner image developed, and removing the toner remaining on said image supporting member, characterized in that said toner is a developing powder which comprises a binder containing 0.1-5% by weight of an olefin homopolymer or copolymer having a melt viscosity at 140° C. of 10-10 6 cps. and containing 50% by weight or more of a crosslinked polymer, said crosslinked polymer in its entirety having a gel content of 10% or less and being prepared from a vinyl type monomer and a crosslinking agent monomer contained in an amount of 0.01-10% by weight based on the total weight of the monomers.
Claim 2
Dependent Claim
120 words
An electrophotographic process comprising developing a latent image on a latent image supporting member with a toner, transferring the toner image developed, and removing the toner remaining on said image supporting member, characterized in that said toner is a developing powder which comprises a binder containing 0.1-5% by weight of an olefin homopolymer or copolymer having a melt viscosity at 140° C. of 10-10 6 cps. and containing 50% by weight or more of a crosslinked polymer, said crosslinked polymer in its entirety having a gel content of 10% or less and being prepared from a vinyl type monomer and a crosslinking agent monomer contained in an amount of 0.01-10% by weight based on the total weight of the monomers.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |