Dehns is proud of its strong reputation in the chemical, pharmaceutical and chemical engineering sectors. We represent clients in the full gamut of chemical arts, including medicines and diagnostic materials, agrochemicals, petrochemicals, polymers, paints, inks and pigments, novel and high-tech materials, photochemistry and food technology.

Our attorneys are experienced at formulating strategies that seek to optimise the legal protection for our clients’ inventions, consistent with the clients’ commercial objectives and the applicable patent laws. We are experienced providers of advice relating to infringement and validity matters, and can also assist in due diligence exercises.

In some countries, the term of patent protection for some pharmaceutical and agrochemical inventions can be extended using Supplementary Protection Certificates. Our team has obtained numerous SPCs for our clients in these sectors of industry.

Patenting Chemical and Pharmaceutical Inventions

Inventions in the chemical arts can encompass medicines and diagnostic materials, agrochemicals, petrochemicals, polymers, paints, inks and pigments, novel and high-tech materials, photochemistry, food technology, chemical engineering and many other fields. In many respects, patent practice in these areas is no different from that in other technical fields; however, there some special factors that may need to be considered.

In general, the patent system allows patent protection to be obtained for products, apparatus, processes and methods of use. Thus, chemical inventions may include physical entities such as new chemical compounds or compositions, and physical acts such as processes for making materials, or methods for using them. It is often appropriate to claim more than one of these aspects in the context of a single patent application; your patent attorney can advise you about this in more detail. For reasons of public policy and history, in some territories there are restrictions on the subject-matter that can be patented. For example, in Europe it is not possible to obtain a patent for a method of treatment of the human or animal body by surgery or therapy, or for a diagnostic method practised on the human or animal body. This provision was implemented with the aim of protecting medical practitioners from the risk of legal action for patent infringement. However, the exclusion has generally been construed narrowly, and furthermore the European Patent Convention incorporates special rules allowing for the patenting of known substances or compositions “for use in” an excluded method, provided that its use for such a method is not already known. In other countries, methods of treatment may be patentable (e.g. in the USA) and/or the manner of claiming pharmaceutical inventions may require certain claim formats. For this reason, it is essential for anyone wishing to protect an invention in this field to consult a patent attorney with relevant experience.

In Europe and most other jurisdictions, the maximum term of a patent is 20 years, counting from the date of filing of the application, and subject to the payment of (usually annual) maintenance fees to the relevant authorities. However, before a patent is granted the patent application is usually subjected to a more or less rigorous examination procedure in order to ensure that it meets the relevant legal requirements.

Examination may take several years, although in some fields, e.g. pharmaceuticals and agrochemicals, such delays may not necessarily disadvantage the applicant, who may often need to carry out clinical or field trials in order to establish the efficacy and safety of the materials covered by the patent application. A measure of delay thus affords applicants welcome flexibility when lead candidates are still being identified, as well as allowing them to respond to changing business priorities.

Additionally, some countries provide for Supplementary Protection Certificates or the like, by which the term of patent protection for products in certain fields can be extended beyond the usual 20-year term.  This applies to fields such as pharmaceuticals which require pre-marketing approval and particularly when there has been delay in obtaining regulatory approval for the patented product. Our team of patent attorneys has obtained numerous SPCs for our clients in these industry sectors, and is well placed to advise on this aspect.

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