US3341416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulation of aspirin in ethylcellulose and its product
Assignee: NCR Voyix Corp
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Filing: 1963-12-11
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Granted: 1967-09-12
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Expires: 1983-12-11
Abstract
No abstract record available.
Inventors
- 👤 Jerrold L Anderson
- 👤 Gary L Gardner
- 👤 Noble H Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:35
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/60; A61K9/00; A61K9/14; A61K9/16; A61K9/1605; A61K9/1611; A61K9/48; A61K9/50; A61K9/5005; A61K9/5021; A61K9/5036; A61K9/5042; A61K9/5047; B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A COMPOSITION FOR THE EN MASSE INDIVIDUAL ENCAPSULATION OF MINUTE PARTICLES OF ASPIRIN IN POLYMERIC MATERIAL, BY USE OF AGITATION, AND HEATING, FOLLOWED BY COOLING WITH CONTINUED AGITATION, CONSISTING OF (A) A VEHICLE CONSISTING OF A MAJOR PART, BY WEIGHT, OF CYCLOHEXANE, AND A MINOR PART, BY WEIGHT, OF POLYETHYLENE CHARACTERIZED SUBSTANTIALLY BY HAVING A MOLECULAR WEIGHT OF ABOUT 7000 AND A SOFTENING POINT OF ABOUT 100-101DEGREES CENTIGRADE; (B) A MINOR PART, BY WEIGHT, OF ETHYL CELLULOSE HAVING AN ETHOXYL CONTENT OF 48.0 TO 49.5 PERCENT, BY WEIGHT, AND A VISCOSITY OF 90-105; AND (C) A MINOR PART, BY WEIGHT, OF POWDERED ASPIRIN.
Claim 2
Dependent Claim
103 words
A COMPOSITION FOR THE EN MASSE INDIVIDUAL ENCAPSULATION OF MINUTE PARTICLES OF ASPIRIN IN POLYMERIC MATERIAL, BY USE OF AGITATION, AND HEATING, FOLLOWED BY COOLING WITH CONTINUED AGITATION, CONSISTING OF (A) A VEHICLE CONSISTING OF A MAJOR PART, BY WEIGHT, OF CYCLOHEXANE, AND A MINOR PART, BY WEIGHT, OF POLYETHYLENE CHARACTERIZED SUBSTANTIALLY BY HAVING A MOLECULAR WEIGHT OF ABOUT 7000 AND A SOFTENING POINT OF ABOUT 100-101DEGREES CENTIGRADE; (B) A MINOR PART, BY WEIGHT, OF ETHYL CELLULOSE HAVING AN ETHOXYL CONTENT OF 48.0 TO 49.5 PERCENT, BY WEIGHT, AND A VISCOSITY OF 90-105; AND (C) A MINOR PART, BY WEIGHT, OF POWDERED ASPIRIN.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |