USGS .pat files are installed with the Civils Extension. These can be manually applied under the 'Hatch Manager'.
1. Go to 'Asset Management | Hatches' from the extension ribbon:
2. Specify the required value in the top panel. The 'Hatch Editor' lower panel will then update - click the 'Hatch' cell. A new row can be created using the 'Add' button if necessary.
3. Once the 'Hatch' cell has been selected (show as 'SOLID' in the example above) the 'Hatch Pattern Palette' will open. Select the 'Custom' tab. The required hatch patterns can usually be found towards the end of this list, each prefixed with 'USCS-':
Select the required pattern and click 'OK'.
4. Repeat the steps above for any further USGS patterns which are required.