They didn't go dark and they didn't deregister their stock.
Form 15 can be used to deregister their stock or a notice of suspension of duty to file reports pursuant to Section 13 and 15(d) of the 1934 Securities Exchange Act.
ENZC (formerly Structural Enhancement Tech Corp) CLEARLY states the filed the form to began reporting under the OTC ALTERNATIVE STANDARDS.
Where is your PROOF that they went dark and deregister their stock?
Timely, Interesting and ACCURATE
Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passion, they cannot alter the state of facts and evidence
John Adams
On November 8, 2011 Structural Enhancement Technologies Corp. filed Form 15 with the Securities and Exchange Commissionand began reporting under the OTC Alternative Standards. The Company has not engaged an auditor since May of 2011 and therefore the following Financial Statements have not been
Definition of SEC Form 15-15D SEC Form 15-15D is a certification of termination of registration of a class of security under Section 12(g) or a notice of suspension of duty to file reports pursuant to Section 13 and 15(d) of the 1934 Securities Exchange Act.