Claims
- 1. A method of maintaining a toxic free area comprising:
sealing said area from contaminants, providing a source of filtered pressurized air, pressurizing said area with pressurized air from said source at a pressure above atmospheric, allowing access to said area only through a contamination control area, and flowing air from said toxic free area to said contamination control area.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2,285,748 |
Oct 1999 |
CA |
|
Parent Case Info
[0001] This application is a divisional application of U.S. application Ser. No. 09/437,337 filed Nov. 10, 1999.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09437337 |
Nov 1999 |
US |
Child |
10141071 |
May 2002 |
US |