Patent US3265630A successfully refreshed from Google Patents.
US3265630A
Expired / Lapsed
US
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Encapsulating lipophilic material by coacervation
Assignee: NCR Voyix Corp
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Filing: 1958-12-22
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Granted: 1966-08-09
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Expires: 1978-12-22
Abstract
No abstract record available.
Inventors
- 👤 Erik H Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR THE PRODUCTION BY COACERVATION OF FINELY DIVIDED ENCAPSULATED SOLID LIPOPHILIC MATERIAL WHICH COMPRISES: (1) INTERMIXING THE SOLID LIPOPHILIC MATERIAL TO BE ENCAPSULATED, AN AQUEOUS SOLUTION OF A GELABLE COLLOID AND AN AQUEOUS SOLUTION OF A STYRENE MALEIC ACID COPOLYMER, AT A PH AT WHICH THE SAID GELABLE COLLOID AND COPOLYMER ARE OPPOSITELY CHARGED AND AT A TEMPERATURE ABOVE THE GELATION TEMPERATURE OF THE SAID GELABLE COLLOID, WHEREUPON A LIQUID PHASE RICH IN THE SAID GELABLE COLLOID AND COPOLYMER SEPARATES FROM A LIQUID PHASE POOR IN SAID COMPONENTS, THE SAID RICH LIQUID PHASE ENCAPSULATING THE LIPOPHILIC PARTICLES, AND (2) SETTING THE ENCAPSULATING MANTLE.
Claim 2
Dependent Claim
105 words
A PROCESS FOR THE PRODUCTION BY COACERVATION OF FINELY DIVIDED ENCAPSULATED SOLID LIPOPHILIC MATERIAL WHICH COMPRISES: (1) INTERMIXING THE SOLID LIPOPHILIC MATERIAL TO BE ENCAPSULATED, AN AQUEOUS SOLUTION OF A GELABLE COLLOID AND AN AQUEOUS SOLUTION OF A STYRENE MALEIC ACID COPOLYMER, AT A PH AT WHICH THE SAID GELABLE COLLOID AND COPOLYMER ARE OPPOSITELY CHARGED AND AT A TEMPERATURE ABOVE THE GELATION TEMPERATURE OF THE SAID GELABLE COLLOID, WHEREUPON A LIQUID PHASE RICH IN THE SAID GELABLE COLLOID AND COPOLYMER SEPARATES FROM A LIQUID PHASE POOR IN SAID COMPONENTS, THE SAID RICH LIQUID PHASE ENCAPSULATING THE LIPOPHILIC PARTICLES, AND (2) SETTING THE ENCAPSULATING MANTLE.
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |