A. MUKHERJEE & CO’s Patent Services  include  the  following :-


  • Patent Search.
  • Patent Drafting.
  • Patent Filing.
  • PCT National Phase Application India.
  • Reply to Patent FER India.
  • Patent Registration.
  • Patent Opposition.
  • Revocation of Patent.
  • Patent Annuity Payments.
  • Patent Assignment.
  • Working of Patent Statements India.
  • PCT Application.
  • PCT Search.
  • Patent Litigation.


A Patent is an exclusive right granted to an inventor of a new and useful article or an improvement of an existing article. A patent is also granted in case a new process is deciphered for the purposes of making an article, the process being absolutely unlike the practiced process of creating the article.


The Patent gives its owner a monopoly for the manufacture, commercial use and distribution over the new article, improvement and/or the new process for a limited period. Patent is the form of intellectual property per excellence. A patent may be granted in respect of a new invention capable of industrial application and gives a monopoly right that can last up to 20 years.


The essentials of an identifiable Patent are novelty, inventive step; lack of obviousness and sufficiency of description and the same remain a constant.



  • Frivolous or contrary to well-established natural laws.
  • Contrary to law or morality or injurious to public health.
  • Scientific principle or formulation of abstract theory.
  • The mere discovery of a new form of a known substance which does not result in the enhancement of the known efficacy of that substance or the mere discovery of new property or new use.
  • Substance by mere admixing.
  • Method of agriculture/horticulture.
  • Method of treatment of human beings, animals.
  • Invention on traditional knowledge/Aggregation or duplication of known properties of traditionally known components.
  • Computer program per se, integrated circuit, mere scheme or rule.



  • Filing should be made immediate after the invention is developed for commercial working.
  • Patent should be filed before any kind of publication or commercial using or communication to others.
  • Delay in filing may involve certain risks;
  • Other invention of substantially same nature may take the advantage of priority, depriving the true and first inventor.
  • An inadvertent publication of invention by inventor or others may damage the novelty of invention.