Section 51. Every corporation whose charter expires by its own limitation or is annulled by forfeiture or otherwise, or whose corporate existence for other purposes is terminated in any other manner, shall nevertheless be continued as a body corporate for three years after the time when it would have been so dissolved for the purpose of prosecuting and defending suits by or against it and of enabling it gradually to settle and close its affairs, to dispose of and convey its property and to divide its capital stock, but not for the purpose of continuing the business for which it was established; provided, that the corporate existence of such a corporation, for the purposes of any suit brought by or against it within said period of three years, shall continue beyond said period for a further period of sixty days after the final judgment in the suit.