US3916065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatographic carrier particles
Assignee: Xerox Corp
•
Filing: 1972-12-18
•
Granted: 1975-10-28
•
Expires: 1992-12-18
Abstract
Abstract Coated electrostatographic carrier particles comprising a core coated with a thermoset, crosslinked acrylic resin to form a thin continuous film of the resin on the core, the acrylic resin comprising esters of acrylic and methacrylic acids.
Inventors
- 👤 Joseph H Moriconi
- 👤 Jr Louis H Burrows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:58
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; G03G9/113; G03G9/1132; G03G9/1137; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996; Y10T428/2998; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/31645; Y10T428/31649; Y10T428/31678; Y10T428/31688; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
54 words
AN ELECTROSTATOGRAPHIC COATED CARRIER PARTICLE HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 50 MICRONS AND ABOUT 1,000 MICRONS, SAID CARRIER PARTICLE COMPRISING A METALLIC CORE COATED WITH A THERMOSET CROSSLINKED ACRYLIC RESIN TO FROM AN ADDHERENT DURABLE FILM OF SAID RESIN ON SAID CORE, SAID ACRYLIC RESIN COMPRISING ESTERS OF ACRYLIC ANDD METHACRYLIC ACIDS.
Claim 2
Dependent Claim
54 words
AN ELECTROSTATOGRAPHIC COATED CARRIER PARTICLE HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 50 MICRONS AND ABOUT 1,000 MICRONS, SAID CARRIER PARTICLE COMPRISING A METALLIC CORE COATED WITH A THERMOSET CROSSLINKED ACRYLIC RESIN TO FROM AN ADDHERENT DURABLE FILM OF SAID RESIN ON SAID CORE, SAID ACRYLIC RESIN COMPRISING ESTERS OF ACRYLIC ANDD METHACRYLIC ACIDS.
Claim 3
Dependent Claim
22 words
An electrostatographic coated carrier particle according to claim 1 wherein said thermoset acrylic resin is a hydroxyl-functional resin crosslinked with nitrogen resins.
Claim 4
Dependent Claim
22 words
An electrostatographic coated carrier particle according to claim 1 wherein said thermoset acrylic resin is a carboxyl-containing polymer crosslinked with epoxy resins.
Claim 5
Dependent Claim
19 words
An electrostatographic coated carrier particle according to claim 3 wherein said carboxyl-containing polymer has been cured with melamine-formaldehyde resins.
Claim 6
Dependent Claim
21 words
An electrostatographic coated carrier particle according to claim 1 wherein said acrylic resin is self-curing at a temperature of about 180*F.
Claim 7
Dependent Claim
25 words
An electrostatographic coated carrier particle according to claim 1 wherein said acrylic resin is curable with catalysts or co-resins at a temperature of about 180*F.
References Cited (Backward Citations)
US2876133A
Cited
US3312640A
Cited
US3526533A
Cited
US3627522A
Cited
US3533835A
Cited
US3507686A
Cited
US3672928A
Cited
US3723114A
Cited
US3725111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |