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Colt rootstock still on patent?

Posted by Itheweatherman USDA 8b, Elevation 2 (My Page) on
Sat, Dec 21, 13 at 23:57

Is colt rootstock still on patent?

I'm asking this question because I'm planning graft it onto my proprietary Krauter vesuvius myrobalan plum x mariposa plum hybrid---I want to use it as an inter-stem for my bing cherry.

If it still on patent, I will not graft it.


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RE: Colt rootstock still on patent?

  • Posted by olpea zone 6 KS (My Page) on
    Sun, Dec 22, 13 at 1:15

Colt patent was issued in the 70s, developed by the Malling station in England. It's patent has long expired. PP#4059


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