How can I convert my PDF file to an image-based PDF file?

Each PDF creation tool is different. However, if you are using Adobe Acrobat:

1. Open the document in Adobe Acrobat or Adobe Reader;
2. Select: File, Print, and choose Adobe PDF printer. (If you have already configured the Adobe Job Options File to work with Adobe Acrobat, a text-based PDF will be created using the Adobe Job Options specification. Otherwise, you can create an image-based PDF by selecting the Advanced tab in the lower left hand corner of the splash window.);
3. Select the check box 'Print to Image' and then click 'OK'; and
4. Browse to the location you want to save the new image PDF file.

USPTO FAQ - Questions and Answers (23NOV2007)