88 F.2d 852, 854. This court has emphasized that the Act should have a liberal interpretation, bearing in mind its remedial character and the legislative purpose. Alfred Hofmann, Inc., v. Knitting Machines Corp., 3 Cir., 1941, 123 F.2d 458, 460; Treemond Co. v. Schering Corp., supra, 122 F.2d at page 703.
The statutory provision limiting declaratory judgments to “cases of actual controversy” is no more than a recognition that the federal judicial power extends only to “cases” or “controversies” in the constitutional sense. Ætna Life Insurance Co. v. Haworth, 1937, 300 U.S. 227, 239, 240, 57 S.Ct. 461, 464, 81 L.Ed. 617, 108 A.L.R. 1000. This constitutional requirement, as applied to declaratory judgments, is not interpreted in any narrow or technical sense. Ætna Life Insurance Co. v. Haworth, supra; Maryland Casualty Co. v. Pacific Coal & Oil Co., 1941, 312 U.S. 270, 61 S.Ct. 510, 85 L.Ed. 826. There must be a concrete case touching the legal relations of parties having adverse legal interests, and susceptible “of an immediate and definitive determination of the legal rights of the parties in an adversary proceeding upon the facts alleged.” The distinction is between a case “appropriate for judicial determination” on the one hand, and a “difference or dispute of a hypothetical or abstract character” on the other. Ætna Life Insurance Co. v. Haworth, supra, 300 U.S. at pages 240, 241, 57 S.Ct. at page 464, 81 L.Ed. 617, 108 A.L.R. 1000. This distinction, as the court pointed out in Maryland Casualty Co. v. Pacific Coal & Oil Co., supra, 312 U.S. at page 273, 61 S.Ct. at page 512, 85 L.Ed. 826, “is necessarily. one of degree.”
It is obvious that a person not now engaged in possible infringing conduct, and having no immediate intention of doing so, but having an academic interest in the law of patents, could not obtain a declaratory judgment against a patentee as to the validity or scope of the patent. Such a dispute would be of “a hypothetical or abstract character” not within the federal judicial power; issue would not be joined, in such a case, between persons having adverse legal interests.
This court said in the Treemond case, supra, 122 F.2d at page 705, that an “actual controversy” within the meaning of the Act “does not exist until the patentee makes some claim that his patent is being infringed.” Perhaps this statement should be qualified so as to admit the possibility of declaratory judgment where the patentee has claimed that the manufacture of a certain product or the practising of a certain process would constitute an infringement and a person who is about to engage in such alleged infringing conduct seeks a declaration of his right to do so. See Borchard, supra, at page 807. But it may be conceded that “the mere existence of the patent is not a cloud on title, enabling any apprehensive manufacturer to remove it by suit.” Borchard, ibid.
Here there is more than that. The patentee has used its patents as an economic weapon against other alleged infringers who declined to take a license. In its suit against the Lee-Tex Company, Anode has asserted that the coagulant-dip process practised by that company constitutes an infringement. It is not denied that Anode has thus publicly asserted such a scope for its patent claims as to embrace the similar methods practised commercially by Dewey & Almy. We think this assertion evidences the existence of a substantial controversy between Anode and Dewey & Almy (parties manifestly having adverse legal interests), “of sufficient immediacy and reality to warrant the issuance of a declaratory judgment.” Maryland Casualty Co. v. Pacific Coal & Oil Co., supra, 312 U.S. at page 273, 61 S.Ct. at page 512, 85 L.Ed. 826. It is a fair inference that Anode in bringing suit against the Lee-Tex Company was counting on the in terrorem effect upon other manufacturers ; this inference is strengthened by the remark of Anode’s president quoted in Browne’s affidavit.
Certainly the fact that Anode had never made any direct threat to sue Dewey & Al-my is not conclusive of the problem. In E. W. Bliss Co. v. Cold Metal Process Co., 6 Cir., 1939, 102 F.2d 105, an actual controversy was held to exist although it was evident that the patentee was exerting every effort to avoid entanglement in litigation with the particular alleged infringer seeking the declaration. In Maryland Casualty Co. v. Pacific Coal & Oil Co., supra, a claimant brought an action of tort against an insured for injuries arising out of an automobile accident. Under the state law the claimant, if successful in obtaining a judgment against the insured, could enforce it by supplementary proceedings against the insurer. Before the tort action had proceeded to judgment the insurance