Following Blaszczak's tweet, Berlin said the missiles are strictly intended for Poland, with German Defense Minister Christine Lambrecht emphasizing, "Patriots are part of NATO's integrated air defense, meaning they are intended to be deployed on NATO territory."
"Any use outside NATO territory," said Lambrecht, "would require prior discussions with NATO and the allies."
Germany, which owns 12 batteries of Patriots, has two units deployed to Slovakia and offered Warsaw another in an effort to step up air-protection there.
Ukraine, though it aspires to join NATO, is currently not a member of the military alliance.
NATO members should agree on a solution: Estonia's defense minister
In an interview with DW, Estonia's Defense Minister Hanno Pevkur maintained that all NATO members must reach a solution together on the issue.
Pevkur agreed with Lambrecht and appealed for unity among NATO members, arguing that "Russia wants to divide us."
The system is based on a collection of radars, command-and-control units, and various missile interceptors, covering a large area. Its radar can track up to 50 targets, and engage five of them at once. Depending on the version in use, the interceptor missiles can reach an altitude of more than two kilometers and hit targets up to 160 kilometers away.
Each unit requires about 90 troops to operate, according to the Center for Strategic and International Studies, a US think tank.
Patriots can defend against tactical ballistic missiles, cruise missiles, drones, aircraft and "other threats" according to Raytheon.
Russia, however, has increasingly made use of cheap Iranian drones that are much more difficult for the Patriot to detect and intercept.
On Monday, German Defense Minister Lambrecht said Berlin wants to lend Warsaw the system because, "Poland is our friend, our ally, and, as a neighbor of Ukraine, especially exposed."