Terminal Disclaimer Field (DISC_TXT)
AcclaimIP can tell you if a terminal disclaimer is present for any US patent. The DISC_TXT field is a text field, and holds a string of information. In every case we have seen to date (i.e., up to 10/27/2015), the text just shows the presence of a terminal disclaimer, and nothing regarding dates, etc.
As a result, this field is most useful if it is treated like a Boolean (true or false) field. You can do this by using the EMPTY field code along with DISC_TXT field.
FIELD:isNotEmptyDISC_TXT--> Finds patents with terminal disclaimers.
FIELD:isEmptyDISC_TXT--> Finds patents without terminal disclaimers.
If you search on DISC_TEXT:Terminal, you'll get the exact same number of results you would get with the FIELD:isNotEmptyDISC_TXT query.
The chart below shows the presence of US granted patents with and without terminal disclaimer data. As you can see, approximately 10% have terminal disclaimer data.