US4777089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microcapsule containing hydrous composition
Assignee: Lion Corp
•
Filing: 1986-05-05
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Granted: 1988-10-11
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Expires: 2006-05-05
Abstract
Abstract A microcapsule containing hydrous composition containing an electrolyte and microcapsules coated with a water-soluble polymer which undergoes phase separation by the action of the electrolyte. The electrolyte causes the above-mentioned phase separation comprising 5% to 80% by weight of water and water-soluble components.
Inventors
- 👤 Masahiro Takizawa
- 👤 Hideyuki Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:01
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/10; B01J13/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987; Y10T428/2989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A microcapsule containing a hydrous composition comprising (i) at least one electrolyte selected from the group consisting of inorganic salts, organic salts, amino acids, and an ionic surfactant and (ii) microcapsule composed of a core material coated with a water-soluble polymer which undergoes phase separation by the action of said electrolyte, said water-soluble polymer being at least one member selected from the group consisting of polyvinyl alcohol, sulfated cellulose, casein alkali metal salts, and water-soluble nylons, and the content of the electrolyte being 10% to 80% by weight based on the total weight of water and the electrolyte.
Claim 2
Dependent Claim
98 words
A microcapsule containing a hydrous composition comprising (i) at least one electrolyte selected from the group consisting of inorganic salts, organic salts, amino acids, and an ionic surfactant and (ii) microcapsule composed of a core material coated with a water-soluble polymer which undergoes phase separation by the action of said electrolyte, said water-soluble polymer being at least one member selected from the group consisting of polyvinyl alcohol, sulfated cellulose, casein alkali metal salts, and water-soluble nylons, and the content of the electrolyte being 10% to 80% by weight based on the total weight of water and the electrolyte.
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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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |