Attempts are (were) being made to raise enough money to acquire Tyhee Gold Corp as a "listed shell company", then purchase assets, to eventually get TDC/TYHJF trading again.

I hope, by Friday, to learn more about the progress of these efforts.

With regard to Tyhee, a shell company is a company that exists but does not actually do any business or have any assets. The most interesting type of shell company (to investors) is one that has a listing. This is a listed shell, and is almost always what is meant by a reference to a shell in an investment context.

Given that it takes time and money to obtain a listing, a listed shell has significant value even if it does not have any assets. Listed shells are therefore often the targets of reverse takeovers.

A listed shell company must have had an active business in the past, or it could not have met the requirements for a listing. Exchanges often take a dim view of shell companies (and even cash shells) and may make it difficult for their listings to be maintained indefinitely without acquiring some real business. 

https://moneyterms.co.uk/shell-company/