This relates to a Trademark, not a patent. The website you provided states the following:
On Thursday, February 19, 2015, a U.S. federal trademark registration was filed for GREEN REAPER FAST ACTING WEED KILLER by Pacific Sands, Inc., Kenosha, NV 53144. The USPTO has given the GREEN REAPER FAST ACTING WEED KILLER trademark serial number of 86540115. The current federal status of this trademark filing is ABANDONED - FAILURE TO RESPOND OR LATE RESPONSE.
Looks like it is in the dustbin of history - a shame, as I think the product name is very good!
