JOINT FILING AGREEMENT
Exhibit 99.1
The persons named below agree to the joint filing on behalf of each of them of a statement on
Schedule 13D (including amendments thereto) with respect to the common stock of Altair
Nanotechnologies Inc. and further agree that this Joint Filing Agreement be included as an exhibit
to such joint filings. In evidence thereof, the undersigned, being duly authorized, have executed
this Joint Filing Agreement this 16th day of December, 2007.
| Xx Xxxxxx LLC | ||||||
| By: | /s/ Xxxxx Xx Xxxxxx | |||||
| Name: | Xxxxx Xx Xxxxxx | |||||
| Title: | President | |||||
| /s/ Xxxxx Xx Xxxxxx | ||||||
| Name: | Xxxxx Xx Xxxxxx | |||||
