Re Northey Rotary Engines Ltd's Patent

The High Court considered a petition by Northey Rotary Engines Ltd. for an extension of the term of Letters Patent No. 19032/34, granted for improvements in rotary air or gas compressors. The patent, originally held by Arthur John Northey, had been assigned to the petitioner, an Australian company. The application for extension was based on the invention's merit, inadequacy of remuneration, and loss due to hostilities. The Commissioner of Patents opposed the application.

The court was required to determine whether an extension of the patent term was warranted under section 84 of the Patents Act 1903-1946. Specifically, the court had to consider whether there was disconformity between the Australian patent claims and the basic foreign application, whether the invention possessed more than ordinary merit or utility, whether the patentee had been inadequately remunerated, and whether such inadequacy was not due to the patentee's own default. Additionally, the court had to assess whether any loss suffered was demonstrably caused by hostilities, as required by section 84(6).

Williams J. found that the modified form of the compressor, which was the subject of exploitation, was not the same invention as that applied for in the United Kingdom, leading to a manifest disconformity and an insuperable objection to extending that part of the patent. Even if disconformity were not an issue, the court held that an extension would not be granted. While acknowledging the invention's merit and the patentee's inadequate remuneration, the court was not satisfied that this inadequacy was not due to the patentee's own fault, noting a lack of genuine effort to exploit the invention in Australia prior to 1948. Furthermore, the court found that the petitioner had failed to prove loss or damage directly attributable to hostilities, deeming the claim under section 84(6) to be unsubstantiated.

Consequently, the application for an extension of the patent term was refused. The petitioner was ordered to pay the costs of the Commissioner of Patents.