US3205175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making ethyl-cellulose-lined liquid-containing minute capsules
Assignee: NCR Voyix Corp
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Filing: 1960-03-09
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Granted: 1965-09-07
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Expires: 1980-03-09
Abstract
No abstract record available.
Inventors
- 👤 Maierson Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:34
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS OF MAKING MINUTE CAPSULES EACH HAVING A WATER-IMMISCIBLE LIQUID NUCLEUS RETAINED WITHIN A GELLED HYDROPHILIC POLYMER MATERIAL WALL LINED WITH A BARRIER FILM OF ETHYL CELLULOSE, INCLUDING THE STEPS OF PROVIDING AN AQUEOUS SOLUTION OF COACERVATABLE AND GELABLE FILMFORMING HYDROPHILIC POLYMER MATERIAL; DISPERSING A LIQUID SOLUTION OF THE LIQUID NUCLEUS MATERIAL AND ETHYL CELLULOSE THEREIN TO THE DESIRED DROP SIZE; CAUSING COACERVATION OF THE POLYMER MATERIAL TO FORM LIQUID COACERVATE ENTITIES, WITH AGITATION OF THE SYSTEM TO CAUSE THE FORMED COACERVATE ENTITIES TO BE DISPERSED IN THE SYSTEM, WHICH COACERVATE ENTITIES DEPOSIT AND COALESCE ON THE LIQUID NUCLEUS DROPS AS LIQUID WALLS, THE ETHYL CELLULOSE AT THE INTERFACE OF A NUCLEUS DROPLET AND ITS DEPOSIT OF POLYMER WALL MATERIAL FORMING A BARRIER FILM; AND, FINIALLY, COOLING THE SYSTEM TO GET THE DEPOSITED WALL MATERIAL.
Claim 2
Dependent Claim
136 words
A PROCESS OF MAKING MINUTE CAPSULES EACH HAVING A WATER-IMMISCIBLE LIQUID NUCLEUS RETAINED WITHIN A GELLED HYDROPHILIC POLYMER MATERIAL WALL LINED WITH A BARRIER FILM OF ETHYL CELLULOSE, INCLUDING THE STEPS OF PROVIDING AN AQUEOUS SOLUTION OF COACERVATABLE AND GELABLE FILMFORMING HYDROPHILIC POLYMER MATERIAL; DISPERSING A LIQUID SOLUTION OF THE LIQUID NUCLEUS MATERIAL AND ETHYL CELLULOSE THEREIN TO THE DESIRED DROP SIZE; CAUSING COACERVATION OF THE POLYMER MATERIAL TO FORM LIQUID COACERVATE ENTITIES, WITH AGITATION OF THE SYSTEM TO CAUSE THE FORMED COACERVATE ENTITIES TO BE DISPERSED IN THE SYSTEM, WHICH COACERVATE ENTITIES DEPOSIT AND COALESCE ON THE LIQUID NUCLEUS DROPS AS LIQUID WALLS, THE ETHYL CELLULOSE AT THE INTERFACE OF A NUCLEUS DROPLET AND ITS DEPOSIT OF POLYMER WALL MATERIAL FORMING A BARRIER FILM; AND, FINIALLY, COOLING THE SYSTEM TO GET THE DEPOSITED WALL MATERIAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |