US5604027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Some uses of microencapsulation for electric paper
Assignee: Xerox Corp
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Filing: 1995-01-03
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Granted: 1997-02-18
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Expires: 2015-01-03
Abstract
Abstract Bichromal balls have two hemispheres, typically one black and one white, each having different electrical properties. Each ball is enclosed within a spherical shell and then a space between the ball and shell is filled with a liquid to form a microsphere so that the ball is free to rotate in response to an electrical field. The microspheres can then be mixed into a substrate which can be formed into sheets or can be applied to any kind of surface. The result is a film which can form an image from an applied electrical field.
Inventors
- 👤 Nicholas K. Sheridon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:40
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/372; G02; G02B; G02B26/00; G02B26/02; G02B26/026; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/25; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A display medium comprising: a plurality of bichromal balls, each having two hemispheric surfaces, one surface differing from the other in both color and electrical characteristics a layer of liquid surrounding each ball, a skin of a first compound surrounding the layer of liquid to form a microcapsule, and a substrate of a second compound within which all of said microcapsules are encapsulated.
Claim 2
Dependent Claim
63 words
A display medium comprising: a plurality of bichromal balls, each having two hemispheric surfaces, one surface differing from the other in both color and electrical characteristics a layer of liquid surrounding each ball, a skin of a first compound surrounding the layer of liquid to form a microcapsule, and a substrate of a second compound within which all of said microcapsules are encapsulated.
Claim 3
Dependent Claim
11 words
The medium of claim 1 wherein said substrate is a solid.
Claim 4
Dependent Claim
11 words
The medium of claim 1 wherein said substrate is a liquid.
Claim 5
Dependent Claim
69 words
A display medium comprising: a plurality of bichromal balls, each having two hemispheric surfaces, one surface differing from the other in both color and electrical characteristics a layer of liquid surrounding each ball, a skin of a first compound surrounding the layer of liquid, and a substrate of a second compound within which all of said microcapsules are encapsulated, which substrate is adapted to be bonded to a surface.
Claim 6
Dependent Claim
69 words
A display medium comprising: a plurality of bichromal balls, each having two hemispheric surfaces, one surface differing from the other in both color and electrical characteristics a layer of liquid surrounding each ball, a skin of a first compound surrounding the layer of liquid, and a substrate of a second compound within which all of said microcapsules are encapsulated, which substrate is adapted to be bonded to a surface.
Claim 7
Dependent Claim
11 words
The medium of claim 4 wherein said adhesive layer is hardenable.
Claim 8
Dependent Claim
12 words
The medium of claim 4 wherein said adhesive layer is a liquid.
Claim 9
Dependent Claim
10 words
The surface of claim 4 wherein said surface is flat.
Claim 10
Dependent Claim
11 words
The surface of claim 4 wherein said surface is not flat.
Claim 11
Dependent Claim
11 words
The surface of claim 4 wherein said surface is a fabric.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-02-18 | 2000-08-19 | 2001-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-18 | 2004-08-19 | 2005-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-18 | 2008-08-19 | 2009-02-18 | $7700.00 | Window Closed / Lapsed |