Welcome to Perquisitum

Perquisitum was formed in 2006. Our team of professional patent searchers have many years of experience within IP information functions in industry and independent search companies, expertise in the chemistry/pharmaceutical and mechanical/device fields, and an excellent understanding of commercial requirements and priorities.

Perquisitum offer specialist patent search and technical information search services including prior art searches, validity searches, registered design searches and infringement searches in the Chemistry and Mechanical fields.


Our Approach

~ Perquisitum

Who We Are

Our experienced patent searchers have worked for independent patent search companies and for leading in-house R&D and patent information services

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Why Perquisitum?

Our wide ranging expertise and flexibility in patent searching means that we will select the sources which best meet your requirements

Let us Help

How We Can Help

Assess your freedom to operate in your chosen field and locate prior art to oppose patents in your path with our professional patent search services

Free Patent Search Estimate

Validity Searches

One of the major steps in launching an opposition to a granted patent which has claims which appear to hinder your freedom to operate is to discover references predating the priority date of the target.

Our aim is to devise search strategies that extend beyond the scope of those conducted previously, in order to uncover disclosures of some or all of the features of the claimed invention.  A wide range of patent and non-patent databases can be used to maximise your chances of successfully finding pertinent documents.



We have a high level of expertise in using the Chemical Abstracts Registry, Beilstein, Markush (Marpat and MMS) and reaction databases and are conversant with Derwent Fragmentation coding.

Chemistry Patent Specialisms


Our expertise includes applications of ‘smart’ technology, automotive and vehicular engineering, packaging, process engineering, medical devices and oil industry methods and apparatus.

Mechanical Patent Specialisms

“Our team of professional patent searchers have many years of experience within IP information functions in industry and independent search companies”

~ Perquisitum

Chemical Molecular Structure Perquisitum Chemistry and Chemical Structure Searches FTO

Experienced & Diligent

Our team of professional patent searchers have many years of experience in chemical and mechanical patent searching and have also delivered thousands of high quality patentability/novelty, validity and infringement/FTO search reports. Ask us for a free patent search estimate to discover how we can help you protect your Intellectual Property rights, determine the validity of third party IP rights or evaluate your Freedom-to-Operate.

Perquisitum Patent Search Service

“Diligently searched”. The successful commercialisation of research and development projects can be dependent on thorough patent searches. Perquisitum Limited has been set up to deliver patent search services which will provide this vital component. All strategies are devised by our most experienced patent searchers and are subject to internal checking and validation. We have an excellent understanding of the public and expert patent information systems available – and their pros, cons and costs. Expertise in chemistry/pharmaceutical and mechanical/device patent searching.


When filing a Registered Design application, it is important to know whether it is novel and has individual character. Alternatively, you may be considering the use of an item or design that could infringe existing rights.

Registered Design Searches

Freedom to Operate

It can be useful to conduct validity searches in stages, with a second search being tailored to learn from the findings of the initial investigation. This makes the most efficient use of your budget and helps customise the strategy.

Freedom to Operate Searches

Prior Art

Whether you are interested in individuals or large companies, the available resources have specific nuances that affect the retrieval of a target’s patent portfolio. Perquisitum can take advantage of these to uncover the references you need to see in your name search.

Prior Art Searches