US4232084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheets containing microencapsulated color-coded micromagnets
Assignee: FAIRFIELD NATIONAL BANK SOUTHEAST 3RD AND DELAWARE STREET WAYNE IL A NATIONAL BANKING CORP
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Filing: 1978-01-25
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Granted: 1980-11-04
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Expires: 1998-01-25
Abstract
Abstract This invention relates to a hardened transparent sheet comprising a binder and hardened microcapsules, the microcapsules containing viewable color-coded micromagnets rotably dispersed in a liquid so as to be magnetically responsive, the microcapsules being pre-hardened independently of the hardening of the binder in forming the sheet.
Inventors
- 👤 Clarence R. Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:10
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/375; H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/0221; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/26; Y10T428/268
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A sheet comprising a hardened transparent film-forming binder and hardened transparent individual microcapsules dispersed in said binder, each microcapsule including a shell wall composed of a material different than the material of said binder, said microcapsules being prepared and completed prior to dispersion in said binder and containing viewable, magnetically responsive, color-coded micromagnets having a constant magnetization vector rotatably dispersed in a liquid, said micromagnets being selected in size from the range of about 25 microns to about 1000 microns, said shell wall surrounding said liquid and forming a barrier wall between said liquid and said binder.
Claim 2
Dependent Claim
97 words
A sheet comprising a hardened transparent film-forming binder and hardened transparent individual microcapsules dispersed in said binder, each microcapsule including a shell wall composed of a material different than the material of said binder, said microcapsules being prepared and completed prior to dispersion in said binder and containing viewable, magnetically responsive, color-coded micromagnets having a constant magnetization vector rotatably dispersed in a liquid, said micromagnets being selected in size from the range of about 25 microns to about 1000 microns, said shell wall surrounding said liquid and forming a barrier wall between said liquid and said binder.
Claim 3
Dependent Claim
42 words
The sheet of claim 1 where the binder coating conforms to the contour of said hardened microcapsules with the portion of each microcapsule projecting out of the body of said binder acting as a view-enhancing lens for the micromagnets within said microcapsules.
Claim 4
Dependent Claim
38 words
The sheet of claim 1 where said film-forming binder is capable of sufficiently softening the prehardened microcapsules to cause them to conform to each other so as to form a substantially gapless layer of microcapsules within said binder.
References Cited (Backward Citations)
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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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |