Pharsight

Zosyn is owned by Wyeth Pharms.

Zosyn contains Piperacillin Sodium; Tazobactam Sodium.

Zosyn has a total of 3 drug patents out of which 3 drug patents have expired.

Expired drug patents of Zosyn are:

Zosyn was authorised for market use on 22 October, 1993.

Zosyn is available in injectable;injection dosage forms.

Zosyn can be used as method of treating bacterial infections.

The generics of Zosyn are possible to be released after 14 April, 2023.

Patent Number	Company	Patent Title	Patent Expiry
These patents focus on the other aspects of the active substance like dosage, mode of administration (oral, tablet, capsules, liquids etc).
US8133883	WYETH PHARMS	Compositions containing piperacillin and tazobactam useful for injection	Apr, 2023 (a month ago)
US6900184	WYETH PHARMS	Compositions containing pipercillin and tazobactam useful for injection	Apr, 2023 (a month ago)
US7915229	WYETH PHARMS	Compositions containing piperacillin and tazobactam useful for injection	Apr, 2023 (a month ago)

Do you want to check out ZOSYN patents from before 2022?

Market Authorisation Date: 22 October, 1993

Treatment: Method of treating bacterial infections

Dosage: INJECTABLE;INJECTION

Strength	Submission Date	ANDA(s) Filed	First applicant approval	Last patent expiry	180 day status
2.25 g/vial 3.375 g/vial 4.5 g/vial	05 Feb, 2009
12 g/1.5 g per vial (pharmacy bulk)	06 Dec, 2011	1	29 Oct, 2014	14 Apr, 2023	Eligible
36 mg/4.5 g per vial (pharmacy bulk)	05 Feb, 2009	1	15 Sep, 2009	14 Apr, 2023	Eligible