CIP vs. Continuation: Which should you file?

CIP or Continuation: What are the differences?

Both types of patent applications fall under the category of a continuing application. A continuing application is a separately filed application that is linked to a previously filed pending non-provisional application. By definition, the continuing application will have at least some of the original subject matter contained in the prior-filed application and at least one common inventor. What distinguishes a CIP from a straight continuation is whether new content is added. Let’s discuss the factors for filing a CIP vs. a continuation application.

Need to file a CIP or continuation application? Email Vic at or call (949) 223-9623 to request a fixed fee cost estimate for filing your child application. 

What is a CIP application?

CIP stands for continuation-in-part which means some of the content has been disclosed in the prior-pending application. By definition, a CIP contains new content which will get a later priority date, i.e., the filing date of the CIP. Therefore, a CIP will necessarily have different priority dates: earlier priority date(s) for the previously disclosed content, and a new priority date for the new subject matter.

What is a continuation application?

A continuation application does not add any new content. Practitioners sometimes refer to this application as a “straight continuation.” The drawings and written specification will generally be the same as those of the parent application. Only the claims will differ. However, the new claims in the continuation must find support in the original specification and drawings. Therefore, a continuation application maintains the priority date of the prior-filed application.

A divisional application is basically a type of continuation with claims directed to embodiments or inventions not elected in the parent application. Divisional applications typically arise as result of a Restriction Requirement in the parent application.

CIP or Continuation: Which continuing application should you file?

If no new content is being added and you wish to pursue different claims on originally disclosed subject matter, then a straight continuation should be filed. This allows the new claims to maintain the earlier priority date. As a result, you can avoid recently filed applications by third parties from being cited against you as prior art.

Here are situations that may make a straight continuation application appropriate:

If new subject matter is being added, then a CIP should be filed if you wish to keep the priority date of the parent. For example, file a CIP to add new features or a newer version of a product.

When is the expiration of a continuing application?

The term of a continuing application is generally twenty years from the first nonprovisional application to which priority is claimed. Therefore, it may be more advantageous to file a new standalone application if that earliest date was several years ago. The tradeoff is a fresh 20-year term in exchange for sacrificing the priority date of the parent patent.

Need help in filing a CIP or continuation application?

Email US patent attorney Vic Lin at or call (949) 223-9623 to see which child application makes the most sense.

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