CN Patent

CN1438898A — 防腐剂

Assigned to Santen Pharmaceutical Co Ltd · Expires 2003-08-27 · 23y expired

What this patent protects

本发明的目的是通过组合液体制剂的常用添加剂提供一种安全的防腐剂。优选的防腐剂是通过组合硼酸和/或硼砂、乙二胺四乙酸或其盐和聚乙烯吡咯烷酮获得的。通过向防腐剂中进一步加入纤维素类聚合物防腐效果可以提高。

USPTO Abstract

本发明的目的是通过组合液体制剂的常用添加剂提供一种安全的防腐剂。优选的防腐剂是通过组合硼酸和/或硼砂、乙二胺四乙酸或其盐和聚乙烯吡咯烷酮获得的。通过向防腐剂中进一步加入纤维素类聚合物防腐效果可以提高。

Drugs covered by this patent

Patent Metadata

Patent number: CN1438898A
Jurisdiction: CN
Classification: —
Expires: 2003-08-27
Drug substance claim: No
Drug product claim: No
Assignee: Santen Pharmaceutical Co Ltd
Source: FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

Track this patent

Get a daily-checked alert when vulnerability score, expiry, classification, or assignee changes. Email, Slack, or Teams delivery. Pro: 50 watches, Free: 3.