Lubes & Greases (April 2004, Page 38) says:
"After years of effort, Royal Purple has received a federal trademark for the exclusive use of purple containers to package lubricants. ... all purple--not just Pantone Purple or one certain shade--is off-limits for competitors' lube containers. ... The company is also in the process of trademarking the purple color of its lubricants."
Does that mean Quaker State can trademark all shades of green container, and Pennzoil all shades of yellow? What about Valvoline? They use white, silver, red, and blue.
"After years of effort, Royal Purple has received a federal trademark for the exclusive use of purple containers to package lubricants. ... all purple--not just Pantone Purple or one certain shade--is off-limits for competitors' lube containers. ... The company is also in the process of trademarking the purple color of its lubricants."
Does that mean Quaker State can trademark all shades of green container, and Pennzoil all shades of yellow? What about Valvoline? They use white, silver, red, and blue.