US2921883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel coating material for medicaments
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1957-05-03
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Granted: 1960-01-19
•
Expires: 1977-05-03
Abstract
No abstract record available.
Inventors
- 👤 Davis R Reese
- 👤 Joseph V Swintosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:08
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; A61K9/5073; A61K9/5078
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A COATING MATERIAL FOR MEDICAMENTS TO PROLONG THE RELEASE OF THE MEDICAMENT IN THE GASTROINTESTINAL TRACT WHICH COMPRISES AN INTIMATE MIXTURE OF A NON-TOXIC, SOLID HYDROXYLATED LIPID MATERIAL SELECTED FROM THE GROUP CONSISTING OF A FATTY ALCOHOL HAVING FROM 12 TO 31 CARBON ATOMS, A FATTY ESTER OF A GLYCOL WHICH HAS AT LEAST ONE FREE HYDROXY GROYP WITH A FATTY ACID OF FROM 12 TO 22 CARBON ATOMS, A FATTY ESTER OF A GLYCEROL WHICH HAS AT LEAST ONE FREE HYDROXY GROUP WITH A FATTY ACID OF FROM 12 TO 22 CARBON ATOMS, A SOLID ESTER OF A FATTY HYDROXY ACID WITH A LOWER ALIPHATIC ALCOHOL, THE SAID ESTER HAVING A TOTAL CARBON CONTENT OF 12 TO 62 CARBON ATOMS, A SOLID ESTER OF A FATTY POLYHYDRIC ALCOHOL WITH A LOWER ALIPHATIC ACID, THE SAID ESTER HAVING A TOTAL CARBON CONTENT OF 12 TO 62 CARBON ATOMS, AND A NON-TOXIC, SOLID CELLULOSE DERIVATIVE REPRESENTED BY CELLULOSE-R IN WHICH THE R MOIETY, IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIC ALKYL GROUP OF FROM 1 TO 5 CARBON ATOMS AND AN ALIPHATIC ACYL GROUP OF FROM 2 TO 22 CARBON ATOMS, THE RATIO BY WEIGHT OF SAID LIPID MATERIAL TO SAID CELLULOSIC MATERIAL BEING FROM ABOUT 1:1 TO ABOUT 9:1.
Claim 2
Dependent Claim
213 words
A COATING MATERIAL FOR MEDICAMENTS TO PROLONG THE RELEASE OF THE MEDICAMENT IN THE GASTROINTESTINAL TRACT WHICH COMPRISES AN INTIMATE MIXTURE OF A NON-TOXIC, SOLID HYDROXYLATED LIPID MATERIAL SELECTED FROM THE GROUP CONSISTING OF A FATTY ALCOHOL HAVING FROM 12 TO 31 CARBON ATOMS, A FATTY ESTER OF A GLYCOL WHICH HAS AT LEAST ONE FREE HYDROXY GROYP WITH A FATTY ACID OF FROM 12 TO 22 CARBON ATOMS, A FATTY ESTER OF A GLYCEROL WHICH HAS AT LEAST ONE FREE HYDROXY GROUP WITH A FATTY ACID OF FROM 12 TO 22 CARBON ATOMS, A SOLID ESTER OF A FATTY HYDROXY ACID WITH A LOWER ALIPHATIC ALCOHOL, THE SAID ESTER HAVING A TOTAL CARBON CONTENT OF 12 TO 62 CARBON ATOMS, A SOLID ESTER OF A FATTY POLYHYDRIC ALCOHOL WITH A LOWER ALIPHATIC ACID, THE SAID ESTER HAVING A TOTAL CARBON CONTENT OF 12 TO 62 CARBON ATOMS, AND A NON-TOXIC, SOLID CELLULOSE DERIVATIVE REPRESENTED BY CELLULOSE-R IN WHICH THE R MOIETY, IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIC ALKYL GROUP OF FROM 1 TO 5 CARBON ATOMS AND AN ALIPHATIC ACYL GROUP OF FROM 2 TO 22 CARBON ATOMS, THE RATIO BY WEIGHT OF SAID LIPID MATERIAL TO SAID CELLULOSIC MATERIAL BEING FROM ABOUT 1:1 TO ABOUT 9:1.
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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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |