var objectsToHold = [];

function addObjectToHold(obj) {
    objectsToHold.push(obj);
}

function clearObjectsToHold(time) {
    setTimeout(function() {
        objectsToHold = [];
    }, time);
}

// then in your code
addObjectToHold(objA);
addObjectToHold(objB);
clearObjectsToHold(250);