US2800457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-containing microscopic capsules and method of making them
Assignee: NCR Voyix Corp
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Filing: 1953-06-30
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Granted: 1957-07-23
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Expires: 1973-06-30
Abstract
No abstract record available.
Inventors
- 👤 Barrett K Green
- 👤 Schleicher Lowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:00
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; A61K9/5089; B01J13/06; B01J13/10; Y; Y10; Y10S; Y10S101/00; Y10S101/29; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
THE METHOD OF MKING OIL-CONTAINING MICROSCOPIC CAPSULES OF COMPLEX HYDROPHILLIC COLLOID MATERIAL, INCLUDING THE STEPS OF PROVIDING AN OIL; MIXING THE OIL WITH TWO COMPATIBLE AQUEOUS SOLS IN WHICH THE OIL IS EMULSIFIED, THE TWO SOLS CONTAINING, RESPECTIVELY, DIFFERENT HYDROPHILIC COLLOID MATERIAL HAVING OPPOSITE ELECTRIC CHARGES IN THE MIXTURE, AT LEAST ONE OF THE COLLOIDS BEING GELLABLE; CAUSING COACERVATION OF THE COLLOIDS MATERIAL BY ADDING WATER TO DILUTE THE COLLOID MIXTURE TO AN EXTENT SUFFICIENT, IN THE ABSENCE OF OIL, TO BRING ABOUT A CLOUDINESS IN THE MIXTURE, TO PRODUCE, BY SEPERATION, A COMPLEX COLLOID RICH PORTION AND A COLLOID POOR PORTION WITH SAID PORTIONS IN EQUILIBRIUM, WHEREBY THE COMPLEX COLLOID RICH MATERIAL DEPOSITS BY COACERVATE FORCES AROUND THE INDIVIDUAL OIL DROPLETS AS NUCLEI, INDIVIDUALLY ENCAPSULATING EACH DROPLET, LEAVING THE RESULTING CAPSULES DISPERSED IN THE RESIDUAL LIQUID CONSISTING OF THE COLLOID-DEPLETED PORTION OF THE MIXTURE, THE FOREGOING STEPS BEING CARRIED OUT WHILE MAINTAINING THE MIXTURE AT A TEMPERATURE ABOVE THE GELATION POINT OF THE COLLOIDS THEREIN; AND GELLING THE ENCAPSULATING COMPLEX COLLOID MATERIAL BY COOLING.
Claim 2
Independent Claim
175 words
THE METHOD OF MKING OIL-CONTAINING MICROSCOPIC CAPSULES OF COMPLEX HYDROPHILLIC COLLOID MATERIAL, INCLUDING THE STEPS OF PROVIDING AN OIL; MIXING THE OIL WITH TWO COMPATIBLE AQUEOUS SOLS IN WHICH THE OIL IS EMULSIFIED, THE TWO SOLS CONTAINING, RESPECTIVELY, DIFFERENT HYDROPHILIC COLLOID MATERIAL HAVING OPPOSITE ELECTRIC CHARGES IN THE MIXTURE, AT LEAST ONE OF THE COLLOIDS BEING GELLABLE; CAUSING COACERVATION OF THE COLLOIDS MATERIAL BY ADDING WATER TO DILUTE THE COLLOID MIXTURE TO AN EXTENT SUFFICIENT, IN THE ABSENCE OF OIL, TO BRING ABOUT A CLOUDINESS IN THE MIXTURE, TO PRODUCE, BY SEPERATION, A COMPLEX COLLOID RICH PORTION AND A COLLOID POOR PORTION WITH SAID PORTIONS IN EQUILIBRIUM, WHEREBY THE COMPLEX COLLOID RICH MATERIAL DEPOSITS BY COACERVATE FORCES AROUND THE INDIVIDUAL OIL DROPLETS AS NUCLEI, INDIVIDUALLY ENCAPSULATING EACH DROPLET, LEAVING THE RESULTING CAPSULES DISPERSED IN THE RESIDUAL LIQUID CONSISTING OF THE COLLOID-DEPLETED PORTION OF THE MIXTURE, THE FOREGOING STEPS BEING CARRIED OUT WHILE MAINTAINING THE MIXTURE AT A TEMPERATURE ABOVE THE GELATION POINT OF THE COLLOIDS THEREIN; AND GELLING THE ENCAPSULATING COMPLEX COLLOID MATERIAL BY COOLING.
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) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |