Patent US20020161443A1 successfully refreshed from Google Patents.
US2798838A
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Method of preparing acetophenetidin tablets
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1954-11-10
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Granted: 1957-07-09
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Expires: 1974-11-10
Abstract
No abstract record available.
Inventors
- 👤 Manford J Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; A61K9/20; A61K9/2004; A61K9/2022; A61K9/205; A61K9/2054; A61K9/2072; A61K9/2077; A61K9/2081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF MAKING AN ACETOPHENETIDIN TABLET WHICH COMPRISES SUSPENDING ACETOPHENETIDIN IN A VOLATILE SOLUTION OF A COATING MATERIAL SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS, A NATURAL GUM AND A PROTEINACEOUS MATERIAL, THE ACETOPHENETIDIN BEING FROM ABOUT 5% TO ABOUT 75% W./V. AND THE COATING MATERIAL BEING ABOUT 0.5% TO ABOUT 30% W./V., THE WEIGHTS BEING MEASURED IN GRAMS AND THE VOLUME IN CUBIC CENTIMETERS, SPRAY DRYING THE FORMED SUSPENSION TO FORM DRY PARTICLES OF THE ACETOPHENETIDIN SUBSTANTIALLY COATED WITH SAID COATING MATERIAL, AND COMPRESSING SAID PARTICLES INTO A TABLET.
Claim 2
Independent Claim
92 words
THE METHOD OF MAKING AN ACETOPHENETIDIN TABLET WHICH COMPRISES SUSPENDING ACETOPHENETIDIN IN A VOLATILE SOLUTION OF A COATING MATERIAL SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS, A NATURAL GUM AND A PROTEINACEOUS MATERIAL, THE ACETOPHENETIDIN BEING FROM ABOUT 5% TO ABOUT 75% W./V. AND THE COATING MATERIAL BEING ABOUT 0.5% TO ABOUT 30% W./V., THE WEIGHTS BEING MEASURED IN GRAMS AND THE VOLUME IN CUBIC CENTIMETERS, SPRAY DRYING THE FORMED SUSPENSION TO FORM DRY PARTICLES OF THE ACETOPHENETIDIN SUBSTANTIALLY COATED WITH SAID COATING MATERIAL, AND COMPRESSING SAID PARTICLES INTO A TABLET.
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) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |