Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9957435 | Methods for inhibiting iron sulfide scale in oil wells | Larry P. Koskan, Barbara E. Moriarty | 2018-05-01 |
| 9914869 | System and method for inhibiting scale formation in oil wells | Larry P. Koskan | 2018-03-13 |
| 9605197 | System and method for inhibiting scale formation in oil wells | Larry P. Koskan | 2017-03-28 |
| 9382466 | Method for inhibiting scale formation in oil wells | Larry P. Koskan | 2016-07-05 |
| 9206062 | Methods to recover and reclaim hydrocarbons or hydrophobic substances in an aqueous environment | Larry P. Koskan, Jon Vander Wonde | 2015-12-08 |
| 8628669 | Methods to recover and reclaim hydrocarbons or hydrophobic substances in an aqueous environment | Larry P. Koskan, Jon Vander Woude | 2014-01-14 |
| 5861356 | Method and composition for enhanced plant productivity comprising fertilizer and cross-linked polyamino acid | Larry P. Koskan, J. Larry Sanders, Robert J. Ross | 1999-01-19 |
| 5854177 | Method for enhanced hydroponic plant productivity with polymeric acids | Larry P. Koskan, J. Larry Sanders, Robert J. Ross | 1998-12-29 |
| 5814582 | Method for enhanced plant productivity | Larry P. Koskan, Robert J. Ross, Lai-Duien Grace Fan | 1998-09-29 |
| 5783523 | Method and composition for enhanced hydroponic plant productivity with polyamino acids | Larry P. Koskan, J. Larry Sanders, Robert J. Ross | 1998-07-21 |
| 5593947 | Method for more efficient uptake of plant growth nutrients | Alan M. Kinnersley, Larry P. Koskan, David J. Strom | 1997-01-14 |
| 5580840 | Method and composition for preservation of cut flowers | David J. Harms | 1996-12-03 |
| 5508434 | Production of a polysuccinimide and derivatives thereof in the presence of a sulfur-containing dehydrating agent | Daniel A. Batzel, James F. Kneller | 1996-04-16 |
| 5391764 | Polyaspartic acid manufacture | Larry P. Koskan, Kim C. Low, Anne M. Atencio | 1995-02-21 |
| 5373086 | Polyaspartic acid having more than 50% .beta. form and less that 50% .alpha. form | Larry P. Koskan, Kim C. Low, Anne M. Atencio | 1994-12-13 |
| 5373088 | Production of polyaspartic acid from maleic acid and ammonia | Larry P. Koskan | 1994-12-13 |
| 5350735 | Composition and method for enhanced fertilizer uptake by plants | Alan M. Kinnersley, Larry P. Koskan, David J. Strom | 1994-09-27 |
| 5315010 | Polyaspartic acid manufacture | Larry P. Koskan, Kim C. Low, Anne M. Atencio | 1994-05-24 |
| 5296578 | Production of polysuccinimide and polyaspartic acid from maleic anhydride and ammonia | Larry P. Koskan | 1994-03-22 |
| 5221733 | Manufacture of polyaspartic acids | Larry P. Koskan, Kim C. Low, Anne M. Atencio | 1993-06-22 |
| 5219952 | Production of high molecular weight polysuccinimide and high molecular weight polyaspartic acid from maleic anhydride and ammonia | Larry P. Koskan | 1993-06-15 |
| 5152902 | Polyaspartic acid as a calcium carbonate and a calcium phosphate inhibitor | Larry P. Koskan, Kim C. Low, Anne M. Atencio | 1992-10-06 |