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Date Published

Note: The information in this part only applies to:

  • standard patent applications with an examination request filed on or after 15 April 2013.
  • innovation patents with an examination request filed on or after 15 April 2013.
  • innovation patents where the Commissioner had not decided before 15 April 2013 to examine the patent.  

For all other standard patent applications/innovation patents, see Claims to Alloys.

Alloys are a well investigated art in which slight changes of constituents or of relative proportions are often known to change the entire character of the resultant alloys. An imprecise claim not limited to the actual alloys disclosed in the specification would lack support if it not only claimed the alloys disclosed in the specification, but was drafted sufficiently broadly to include hypothetical equivalent alloys which had not been investigated at all, and, in view of the state of the art, were not part of the invention.  

Very small differences in the composition of an alloy can make a large difference in physical properties.  Such differences cannot be predicted and hence the invention will reside in specific alloy compositions which have particular desired properties. In these cases, imprecise terms such as “about” or “including”, or including the presence of some undefined alloy components or claiming component amounts outside the described ranges, are not limited to the inventive alloys described.  Such claims may not be supported by the matter in the specification.  Note, however, that including a statement in the claim identifying the presence of unavoidable impurities within the alloy is allowed, provided there is similar disclosure in the body of the specification.

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