International Patent Applications


International patent applications also known as PCT (Patent Cooperation Treaty) applications, allow a single international application to be filed which then serves as a basis to file patent applications into multiple countries. These countries include most of the main jurisdictions of economic interest such as the USA, Europe and China. However, there are some countries which are not part of the PCT.

First Application or Associated with a Provisional Patent Applicant

PCT applications may be filed as first application or claim priority from an earlier filed provisional patent application. Once filed, the application undergoes an international search and opinion in which an indication of patentability is provided. Depending on the outcome of the search and opinion you may elect to make some amendments to your application and request a preliminary examination of your application.

National Phase Entry

Within 30 months (31 months for some countries) from the earliest priory date, usually the filing date of the provisional patent application, further patent applications are required to be filed in each country in which you wish to seek patent protection – this is called national phase entry. After national phase entry, each application usually proceeds as a separate complete patent application and is subject to the law of the individual country in which the application is filed.

International Patent Application (PCT Application) Strategy

There are a number of financial and strategic advantages and/or disadvantages to filing a PCT application. In particular, the government fees alone for filing a PCT application are now about $4,400 so it is important that all PCT applications are expertly prepared to ensure the application proceeds smoothly through the patent system. If you would like to know more, please feel free to contact us for further information.


What our clients say

As I move into consultancy, I would like to acknowledge your part in assisting WEARX achieve its IP management plan objectives. We moved our portfolio for a large Sydney based Patent Attorney firm in mid-2013 to Caska IP – and I’m pleased to say this has paid off. Your dedicated approach to finding the best way to provide us with appropriate IP protection in challenging market conditions, has helped us achieve commercial security and good management. In summary, your service level and cost base has exceeded our expectations.

Jerry Hoslin, Director & Founder, WearX

I have been involved in business consultancy for over 25 years. This has involved launching new businesses, ideas, products as well as assisting existing businesses to expand. In that time I have experienced many start ups and dealt with a large range of Intellectual Property. Andrew Caska, Principal Patent Attorney of Caska IP, has recently provided his services to one of my clients and we worked closely to formalise important patents and trade marks. His understanding of the invention, his work and timely delivery were all first class and we are very happy with the outcomes.

Grant Harms, Business Consultant,

Caska IP has been more than supportive in protecting Automed Pty Ltd IP for the agricultural and medical industry. In working with IP& we have developed a clear IP strategy for patents and trademarks for our products, for the Australian market and the international market. We are more than happy with their dedication and level of service and would recommend them to any small or large organisation

David Edwards, CEO & Founder, Automed Pty Ltd

As an individual inventor, I set out to find a Patent Attorney service that was accessible and reasonably priced to assist in lodging my first patent application. I found Caska IP to be not only affordable and accessible, but highly professional and attentive to my needs and requirements. Caska IP worked with me to assist in refining my idea and expressing its unique qualities. I highly recommend Caska IP to the individual inventor.

Lester Walters, Inventor, QUAD R&D Pty Ltd

I was relatively unaware of what was needed and admit to being a bit nervous. Your perception and interpretation of what I was trying to achieve gave me great comfort. On receipt of the initial draft I was impressed with the professional presentation and the attention to detail with little alteration being required. You may rest assured that I will be using Caska IP for future projects (of which I have several) after this one is put to bed.

John Plumridge, Inventor

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