estaban venciendo
-they/you were defeating
Imperfecto progresivo para el sujetoellos/ellas/ustedesdel verbovencer.

vencer

Los registros se estaban venciendo y habría inspecciones serias.
The registrations were expiring, and the facility was undergoing serious inspections.
Cuando se las había creado, representaban el estado del arte. Pero se tornaron obsoletas y ya no cumplían las exigencias actuales de la agencia de control, Anvisa. Los registros se estaban venciendo y habría inspecciones serias.
They were state of the art when they were established, but they had gotten older and no longer could meet the current demands of ANVISA, the Brazilian Health Surveillance Agency. The registrations were expiring and the facility was undergoing serious inspections.
Palabra del día
el hada madrina