In patent prosecution, the Patent Office fees are usually quite low when compared to the cost of hiring a patent attorney. I’m predicting that the usual equation is not quite true for Angiotech International who was recently asked to pay $1.25 Million in application filing fees for a patent application having about 10,000 claims. (File Attachment: Fee Due.pdf).
As would be expected, the patentee quickly submitted an amended specification that cut the disclosure to three independent claims and 96 dependent ones — thus reducing its PTO bill to only two grand.
As Greg Aharonian noted, it is lucky that the applicant was a small entity — otherwise the fee would have been over $2,000,000. (Published Application)