Prolonged release drug form for the treatment of bovine mastitis
US4011312A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1975 |
| Grant date | Mar 8, 1977 |
| Priority date | — |
| Expiry date | Jun 25, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/204
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A prolonged release drug dosage form for the treatment of bovine mastitis, specifically suited for dry cow treatment, consists of an antimicrobial agent dispersed in a matrix of a low molecular weight polyester of glycolic and lactic acids, and shaped as a cylindrical bougie for facile insertion into the teat canal. Said polyester erodes by hydrolysis in the bioenvironment, providing a continuous release of the medication throughout the desired duration of the treatment. The low molecular weight polyesters have a glycolic acid content of about 60 to 80 mole percent, a lactic acid content of about 20 to 40 mole percent, and a molecular weight less than 2000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.