That "no" probably expired a long time ago. Another lawyer would be able to tell you.

Often enough, only specific trade secrets get long-term protection.

Non-commissioned crewmen on board ships conducting classified missions, not themselves cleared, can usually say everything they did; it was the officers' responsibility to keep them from knowing any classified details.

Thanks for the (mostly irrelevant to this case) details, but I can't divulge the reason for the No, and I do suspect it would still apply.