I'm filing a patent application in the UK covering 10 or so linked inventions spanning various industries. I plan to use multiple dependent claims to link the various inventions. I believe the number of independent and dependent claims is effectively unlimited in the UK, with no charge for excess.
What are the benefits and risks of listing many permutations of claims? For example, consider the following:
Claims 1-10 are related to invention A
Claims 11-20 are related to invention B
Claims 21-30 are related to invention C
Claims 31-40 are related to invention D
41) The systems of claims 1-10 in conjunction with the method of claims 11-20.
42) The systems and methods of claim 41 in conjunction with the method of claims 21-30
43) The systems and methods of claims 41 and 42 in conjunction with the method of claims 31-40
44) etc, etc..
Potentially thousands of theoretical claims are claimed. Am I likely to fall foul of the IPO rejecting them on the grounds that they are
... of a total number or complexity not justified by the nature of the invention
... in principle unsearchable by reason of the number of alternatives embraced, or the choice of characterizing parameters or desiderata
Taken from the code of practice here.
If they decide there are multiple inventions, what happens? If the application is divided, how do claims reference claims in the other applications?
Say invention A was deemed obvious over another patent. Are my claims of invention A in conjunction with inventions B, C and D still potentially valid?