May get revoked? Apparently they do not have a transfer agent, either. Florida did revoke Heathrow, not sure about Delaware.
The SEC may revoke the registration of stocks. In some circumstances, the SEC may revoke the registration of a defunct company's stock. Section 12(j) of the Exchange Act authorizes the SEC to revoke the registration of a security if the issuer fails to comply with the federal securities laws. Broker-dealers may not execute any trades in stocks whose registration has been revoked pursuant to Section 12(j).
A defunct company may not have a transfer agent. In some situations, the defunct company does not have a transfer agent. Although the federal securities laws do not require a company to have a transfer agent, if a company does not have a transfer agent, investors are unable to receive or transfer their stock certificates. Sometimes the SEC has considered a company's lack of a transfer agent as a factor in determining whether to revoke the registration of stock pursuant to Section 12(j) for the protection of investors.