Section 80. When the Right of Appraisal May Be Exercised.— Any stockholder of a corporation shall have the right to dissent and demand payment of the fair value of the shares in the following instances:

1. In case an amendment to the articles of incorporation has the effect of changing or restricting the rights of any stockholder or class of shares, or of authorizing preferences in any respect superior to those of outstanding shares of any class, or of extending or shortening the term of corporate existence;

2. In case of sale, lease, exchange, transfer, mortgage, pledge or other disposition of all or substantially all of the corporate property and assets as provided in this Code;

3. In case of merger or consolidation; and

4. In case of investment of corporate funds for any purpose other than the primary purpose of the corporation.