US4869955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester support for preparing electrostatic transparencies
Assignee: EIDP Inc
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Filing: 1988-03-11
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Granted: 1989-09-26
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Expires: 2008-03-11
Abstract
Abstract An element suitable for preparing transparencies using an electrostatic plain paper copier is described. This element comprises a polyethylene terephthalate support (polyester), at least one subbing layer coated thereon and coated to the subbing layer a toner receptive layer comprising a mixture of an acrylate binder, a polymeric antistatic agent having carboxylic acid groups, a cross-linking agent, butylmethacrylate modified polymethacrylate beads and submicron polyethylene beads. These elements produce excellent transparencies.
Inventors
- 👤 Robert W. Ashcraft
- 👤 John H. Bayless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:02
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0053; G03G7/0006; G03G7/002; G03G7/0026; G03G7/004; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/162; Y10T428/25; Y10T428/254; Y10T428/31504; Y10T428/31786; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
60 words
An element suitable for preparing electrostatic transparencies comprising a polyester support having coated thereon in order at least one subbing layer, and a toner receptive layer, wherein said toner receptive layer comprises an acrylate binder containing carboxylic acid groups, a polymeric antistatic agent having carboxylic acid groups thereon, a cross-linking agent, butylmethacrylate modified polymethacrylate beads and polyethylene or tetrafluoroethylene beads.
Claim 2
Dependent Claim
60 words
An element suitable for preparing electrostatic transparencies comprising a polyester support having coated thereon in order at least one subbing layer, and a toner receptive layer, wherein said toner receptive layer comprises an acrylate binder containing carboxylic acid groups, a polymeric antistatic agent having carboxylic acid groups thereon, a cross-linking agent, butylmethacrylate modified polymethacrylate beads and polyethylene or tetrafluoroethylene beads.
Claim 3
Dependent Claim
36 words
The element of claim 1 wherein the modified polymethylmethacrylate beads have an average particle size of about from 1 to 50 microns and the polyethylene or tetrafluoroethylene bead have a particle size less than one micron.
Claim 4
Dependent Claim
30 words
The element of claim 1 wherein a subbing layer is applied to both sides of said support and a toner receptive layer is coated on both of said subbing layers.
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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) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |