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| 9174850 | Gaseous ammonia removal method | Oct 30, 14 | Nov 03, 15 | THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF AGRICULTURE |
| 8974763 | System and method for production of granular ammonium sulfate | Dec 18, 13 | Mar 10, 15 | PCI NITROGEN, LLC |
| 8961915 | Wet scrubber for ammonia capture | Sep 25, 13 | Feb 24, 15 | OHIO STATE INNOVATION FOUNDATION |
| 8906332 | Gaseous ammonia removal system | Mar 15, 11 | Dec 09, 14 | THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF AGRICULTURE |
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| 8309048 | Process for producing ammonium salts | Apr 18, 11 | Nov 13, 12 | CELANESE INTERNATIONAL CORPORATION |
| 8303921 | Process for producing ammonium salts | Apr 18, 11 | Nov 06, 12 | CELANESE INTERNATIONAL CORPORATION |
| 6117406 | Process for manufacturing ammonium salts | Feb 12, 99 | Sep 12, 00 | Kaltenbach-Thuring S.A. |