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Details for Patent: 6,017,922
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Summary for Patent: 6,017,922
| Title: | Thermally stable trimetrexates and processes for producing the same |
| Abstract: | The present invention provides for thermally stable forms of 2,4-diamino-5-methyl-6-[(3,4,5-trimethoxyanilino)methyl] quinazoline, or trimetrexate. A crystalline 2,4-diamino-5-methyl-6-[(3,4,5-trimethoxyanilino)methyl] quinazoline monohydrate, or trimetrexate monohydrate, belonging to the space group P1(#2) and having a triclinic cell with dimensions of about a=7.699 .ANG., b=9.606 .ANG. and c=13.012 .ANG. is disclosed. A novel Schiff base compound, 2,4-diamino-5-methyl-6-[(3,4,5-trimethoxyphenylimino)-methinyl]quinazoline , is also disclosed. The present invention further provides novel methods of producing stable trimetrexate free base compounds, including crystalline trimetrexate monohydrate. The crystalline monohydrate form provides increased stability over the anhydrous form. |
| Inventor(s): | Stogniew; Martin (Blue Bell, PA), Grafe; Ingomar (Nurnberg, DE), Morsdorf; Johann (Langenzenn, DE) |
| Assignee: | U.S. Bioscience, Inc. (Conshohocken, PA) |
| Application Number: | 09/080,290 |
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Patent Claim Types: see list of patent claims | Compound; Composition; |
Drugs Protected by US Patent 6,017,922
| Applicant | Tradename | Generic Name | Dosage | NDA | Approval Date | TE | Type | RLD | RS | Patent No. | Patent Expiration | Product | Substance | Delist Req. | Patented / Exclusive Use | Submissiondate |
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| >Applicant | >Tradename | >Generic Name | >Dosage | >NDA | >Approval Date | >TE | >Type | >RLD | >RS | >Patent No. | >Patent Expiration | >Product | >Substance | >Delist Req. | >Patented / Exclusive Use | >Submissiondate |
International Family Members for US Patent 6,017,922
| Country | Patent Number | Estimated Expiration | Supplementary Protection Certificate | SPC Country | SPC Expiration |
|---|---|---|---|---|---|
| Australia | 4081799 | Start Trial | |||
| Brazil | 9910543 | Start Trial | |||
| Canada | 2333274 | Start Trial | |||
| >Country | >Patent Number | >Estimated Expiration | >Supplementary Protection Certificate | >SPC Country | >SPC Expiration |
