In the wake of Phillips v. AWH, it has become even more important to ensure that a patent’s specification accurately describes the meaning of the associated claim terms. This task is all but impossible in the absence of any claim terms to describe. Thus, it is important to draft at least a few model claims with the provisional application. Some practitioners, such as Russ Krajec, have advocated drafting the claims but then deleting them from the application before filing. Russ argues that claims in the provisional can only hurt the applicant.
I include at least one extremely broad, never likely obtainable claim in a provisional. First under US law, it is true that a provisional need not include one in order to be considered valid. But foreign courts can say otherwise and render the US provisional (if serving as a priority document) invalid in a foreign court. Not including a provisional claim is only useful if you are absolutely certain that you won't go foreign. I hear the arguments related to the effect of narrowing by amendment as creating PHE. In the post-Festo world, you can at least explain the amendment so as to overcome the presumption of PHE. Let's face it, if you are relying on the DOE to win your case anyway and the case rests on whether you started broad and narrowed by amendment, you are fighting a likely unwinnable battle. In the last 10 years or so, how many DOE cases has the Fed. Circuit actually upheld? Not too many. No U.S. practitioner has been able to cite a case, rule, regulation, expanded Board of Appeals decision, etc. from a foreign court that has categorically said, "A U.S. provisional application serving as a priority document [to this foreign application] that does not include at least one claim is nonetheless considered a permissible priority document." Why take the chance of not including a claim in a provisional if there is a likelihood that the foreign counterpart could get knocked out. Another reason to the include at least a broad claim is that most foreign laws have strict adherence to the rule that the broadest initially presented claim will set the claim scope for the application. So if you present a very broad claim initially, you can amend narrower. But if you present a narrower claim first then realize that you can go broader, you cannot amend to go broader. It is for this reason you can include a "claim" that says something like, "I claim, the product comprising any feature described, either individually or in combination with any feature, in any configuration." or a "process to [...] comprising any process described, in any order, using any modality, ..."