US5354634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic image transfer recording sheet
Assignee: AGC Inc
•
Filing: 1992-04-03
•
Granted: 1994-10-11
•
Expires: 2012-04-03
Abstract
Abstract An electrostatic image transfer recording sheet which comprises a substrate having, on one side thereof, an image-forming layer made of a porous alumina hydrate and, on the other side, a porous alumina hydrate layer.
Inventors
- 👤 Katsutoshi Misuda
- 👤 Nobuyuki Yokota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:34
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; G03G7/0013; G03G7/0086; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
63 words
An electrostatic image transfer recording sheet which comprises a substrate having, on one side thereof, an image forming layer constituted of a porous alumina hydrate in a binder and on the other side, a layer of porous alumina hydrate in a binder, wherein in each of said layers, the amount of binder ranges from 5 to 50% by wt of the alumina hydrate.
Claim 2
Dependent Claim
63 words
An electrostatic image transfer recording sheet which comprises a substrate having, on one side thereof, an image forming layer constituted of a porous alumina hydrate in a binder and on the other side, a layer of porous alumina hydrate in a binder, wherein in each of said layers, the amount of binder ranges from 5 to 50% by wt of the alumina hydrate.
Claim 3
Dependent Claim
29 words
The electrostatic image transfer recording sheet according to claim 1, wherein the porous alumina hydrate layer on the opposite side to the image-forming layer side, is made of pseudo-boehmite.
Claim 4
Dependent Claim
21 words
The electrostatic image transfer recording sheet according to claim 1, wherein the porous alumina hydrate of the image-forming layer is pseudo-boehmite.
Claim 5
Dependent Claim
33 words
The electrostatic image transfer recording sheet according to claim 3, wherein the porous alumina hydrate of the image-forming layer is porous pseudo-boehmite having an average pore radius of from 15 to 30 Å.
Claim 6
Dependent Claim
52 words
The electrostatic image transfer recording sheet according to claim 1, wherein the image-forming layer comprises a lower layer made of porous pseudo-boehmite having an average pore radius of from 15 to 30 Å and an upper layer made of porous pseudo-boehmite having an average pore radius of from 35 to 100 Å.
Claim 7
Dependent Claim
42 words
The electrostatic image transfer recording sheet according to claim 5, wherein the lower layer has a surface density of from 2 to 10 g/m 2 , and the upper layer has a surface density of from 0.5 to 3 g/m 2 .
Claim 8
Dependent Claim
42 words
The electrostatic image transfer recording sheet according to claim 5, wherein the lower layer has a surface density of from 4 to 10 g/m 2 , and the upper layer has a surface density of from 0.5 to 2 g/m 2 .
Claim 9
Dependent Claim
15 words
The electrostatic image transfer recording sheet according to claim 1, wherein the substrate is transparent.
Claim 10
Dependent Claim
18 words
The electrostatic image transfer recording sheet according to claim 1, wherein the substrate is made of polyethylene terephthalate.
Claim 11
Dependent Claim
21 words
A recorded product comprising an electrostatic image transfer recording sheet of claim 1 having an electrostatic image transfer toner spreaded thereon.
Claim 12
Dependent Claim
38 words
The electrostatic image transfer recording sheet according to claim 1, wherein each of said image-forming layer and the alumina hydrate layer on the opposite side to the image-forming layer has a thickness of from 0.5 to 50 μm.
Claim 13
Dependent Claim
41 words
The electrostatic image transfer recording sheet according to claim 1, wherein said image-forming layer comprises two layers, the lower having a thickness of from 1.5 to 10 μm while the thickness of the upper layer is from 0.2 to 3 μm.
References Cited (Backward Citations)
US4500645A
Cited
EP0240147A2
Cited
US4711816A
Cited
EP0298424A2
Cited
US4879166A
Cited
JPH02276671A
Cited
US5104730A
Cited
US5185213A
Cited
US5202205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |