Complex sentence: A full specification complying with all rules may not be required to obtain a filing date, for example in the United Kingdom, claims and an abstract are not required to obtain a filing date, but can be added later.
Split into simpler sentences: A full specification complying with all rules may not be required to obtain a filing date. For example, in the U.K., claims and an abstract are not required to obtain a filing date, but can be added later.