Interim injunctions are perhaps the most important interlocutory remedy in IP litigation. They can effectively determine the outcome of a case by restraining alleged infringement during the lengthy trial process. Understanding the three-factor test is essential for practitioners.
Rule 1: "Where in any suit it is proved by affidavit or otherwise-
(a) that any property in dispute in a suit is in danger of being wasted, damaged or alienated by any party to the suit, or wrongfully sold in execution of a decree, or
(b) that the defendant threatens, or intends, to remove or dispose of his property with a view to defrauding his creditors,
the Court may by order grant a temporary injunction to restrain such act..."
Rule 2: Provides for injunction to restrain repetition or continuance of breach.
The Three-Factor Test
The plaintiff must establish a prima facie case - not final proof, but sufficient showing that there is a "triable issue" or "serious question to be tried." In IP cases, this requires:
- Valid IP right (registration certificate, copyright ownership)
- Prima facie infringement by defendant
- Absence of obvious invalidity defense
The plaintiff must show that damages would not be an adequate remedy - the injury would be "irreparable." In IP cases, this includes:
- Damage to reputation and goodwill
- Loss of exclusivity of the IP right
- Market confusion affecting customer relationships
- Difficulty in quantifying actual damages
The court weighs the relative hardship to each party. Factors include:
- Duration of plaintiff's use vs. defendant's use
- Investment made by each party
- Public interest considerations
- Whether defendant adopted mark with knowledge
- Plaintiff's delay in seeking relief
The three factors are interrelated and may be applied flexibly:
- Strong prima facie case may reduce need for detailed balance of convenience analysis
- In trademark cases, once deceptive similarity is shown, irreparable harm is often presumed
- Weak prima facie case requires stronger showing on other factors
- Public interest can override other factors in certain cases (pharmaceutical patents)
The Supreme Court laid down principles for interim injunctions:
- The three factors must be considered together, not in isolation
- Court should not prejudge the merits at interim stage
- Status quo as of date of suit filing is generally maintained
- The object of interim injunction is to protect plaintiff from injury pending trial