US2897121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pharmaceutical composition
Assignee: Pharmacia and Upjohn Co
•
Filing: 1957-06-04
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Granted: 1959-07-28
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Expires: 1977-06-04
Abstract
No abstract record available.
Inventors
- 👤 John G Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:20
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; A61K9/5073; A61K9/5078; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/284; A61K9/286; A61K9/2866; Y; Y10; Y10S; Y10S424/00; Y10S424/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR PRODUCING A MEDICAMENT PROTECTED BY AN ENTERIC MATERIAL WHICH INCLUDES THE STEP OF COATING SAID MEDICAMENT WITH A THIN FILM COMPRISING A FINELY DIVIDED MINERAL SOLID WHOSE CRYSTALS ARE MICACEOUS IN FORM AND HAVING A PARTICLE SIZE LESS THAN ABOUT FIFTY MICRONS DISPERSED IN A HYDROLYZED STYRENE-MALEIC ANHYDRIDE COPOLYMER WHICH IS MORE THAN FIFTY PERCENT HYDROLYZED.
Claim 2
Dependent Claim
59 words
A PROCESS FOR PRODUCING A MEDICAMENT PROTECTED BY AN ENTERIC MATERIAL WHICH INCLUDES THE STEP OF COATING SAID MEDICAMENT WITH A THIN FILM COMPRISING A FINELY DIVIDED MINERAL SOLID WHOSE CRYSTALS ARE MICACEOUS IN FORM AND HAVING A PARTICLE SIZE LESS THAN ABOUT FIFTY MICRONS DISPERSED IN A HYDROLYZED STYRENE-MALEIC ANHYDRIDE COPOLYMER WHICH IS MORE THAN FIFTY PERCENT HYDROLYZED.
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) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |