WIPO and PATSTAT (III): patents entering national and regional phase

As previously stated on part (I) of this topic, WO patents pass across two phases: international and national (or regional in EP case).

In this post I'll face the issue of determining how to distinguish PCT applications that entered the latter phase.


I'll referr to the case of EURO-PCT appication but it may be valid also for any other patent office.

We already know that by selecting Appln_auth = ‘EP’, Appln_kind = ‘W’, Publn_auth = ‘WO’, we gather PCT at international phase that were filed at the EPO. 

PCT applications that have entered the European regional phase will have (a) corresponding EP application(s) for which the international_appln_id refers to the original PCT application.
So, you have to select all EPO applications (Appln_auth EP) having a Internat_appln_id filled in (PATSTAT team say it’s exhaustive for EPO).

Mind that the Application kind will be ‘A’, not ‘W’, since these have been validated as EPO applications (entrance to the EPO regional phase).

Let’s consider this EURO-PCT  applications

APPLN_ID	APPLN AUTH	APPLN_NR	APPLN KIND	APPLN_FILING DATE	IPR TYPE
15808675	'EP'	'        9901446'	'W'	'1999-03-05'	'PI'

That gives origin to this publication

PAT_PUBLN ID	PUBLN_ AUTH	PUBLN_NR	PUBLN_ KIND	APPLN_ID	PUBLN_DATE
17714675	'WO'	'        9944650'	'A1'	15808675	'1999-09-10'

Now we cross check the application_id on internat_appln_id of TLS201 and we get  this:

APPLN_ID	APPLN AUTH	APPLN_NR	APPLN KIND	APPLN_FILING DATE	IPR TYPE	INTERNAT APPLN_ID
1289254	'AU'	'        3328799'	'D'	'1999-03-05'	'PI'	15808675
15821876	'EP'	'       00104638'	'A'	'2000-03-03'	'PI'	15808675
52820607	'US'	'       51888700'	'A'	'2000-03-06'	'PI'	15808675

This means:  the international application gave origin to 2 national phase and 1 regional phase patent.

See also this patent on espacenet along with it’s patent family.

Thanks to Catalina Martinez, Helene Dernis and Geert Boedt for clarifying me the issue.
NOTE: I know I should have posted part II before part III but I swear next week I'll post it...