Assignee
DONLAR CORP
US·48 granted patents·1,304 citations·filing 1991–2002
Top patents by PatentIndex Score
48 records- 0196US5219952AProduction of high molecular weight polysuccinimide and high molecular weight polyaspartic acid from maleic anhydride and ammoniaDONLAR CORP·Filed 1992·Granted Jun 15, 1993·84 cites·10 claims
- 0295US5296578AProduction of polysuccinimide and polyaspartic acid from maleic anhydride and ammoniaDONLAR CORP·Filed 1992·Granted Mar 22, 1994·68 cites·11 claims
- 0393US5284512APolyaspartic acid and its salts for dispersing suspended solidsDONLAR CORP·Filed 1993·Granted Feb 8, 1994·66 cites·17 claims
- 0493US5221733AManufacture of polyaspartic acidsDONLAR CORP·Filed 1991·Granted Jun 22, 1993·70 cites·2 claims
- 0591US5593947AMethod for more efficient uptake of plant growth nutrientsDONLAR CORP·Filed 1994·Granted Jan 14, 1997·63 cites·8 claims
- 0690US5661103ASeed treatment composition and methodDONLAR CORP·Filed 1995·Granted Aug 26, 1997·84 cites·15 claims
- 0790US5350735AComposition and method for enhanced fertilizer uptake by plantsDONLAR CORP·Filed 1992·Granted Sep 27, 1994·49 cites·20 claims
- 0890US5152902APolyaspartic acid as a calcium carbonate and a calcium phosphate inhibitorDONLAR CORP·Filed 1991·Granted Oct 6, 1992·77 cites·13 claims
- 0989US5478919AAspartic acid copolymers and their preparationDONLAR CORP·Filed 1994·Granted Dec 26, 1995·41 cites·5 claims
- 1088US6620338B2Composition for inhibition of metal corrosionDONLAR CORP·Filed 2002·Granted Sep 16, 2003·20 cites·14 claims
- 1188US5116513APolyaspartic acid as a calcium sulfate and a barium sulfate inhibitorDONLAR CORP·Filed 1991·Granted May 26, 1992·64 cites·12 claims
- 1286US5612384ASuperabsorbing polymeric networksDONLAR CORP·Filed 1994·Granted Mar 18, 1997·44 cites·11 claims
- 1382US5861356AMethod and composition for enhanced plant productivity comprising fertilizer and cross-linked polyamino acidDONLAR CORP·Filed 1997·Granted Jan 19, 1999·39 cites·33 claims
- 1482US5508434AProduction of a polysuccinimide and derivatives thereof in the presence of a sulfur-containing dehydrating agentDONLAR CORP·Filed 1994·Granted Apr 16, 1996·29 cites·41 claims
- 1579US5373088AProduction of polyaspartic acid from maleic acid and ammoniaDONLAR CORP·Filed 1994·Granted Dec 13, 1994·24 cites·14 claims
- 1678US5935909ATreatment of tree seedlings to enhance survival rateDONLAR CORP·Filed 1997·Granted Aug 10, 1999·27 cites·11 claims
- 1775US5783523AMethod and composition for enhanced hydroponic plant productivity with polyamino acidsDONLAR CORP·Filed 1997·Granted Jul 21, 1998·21 cites·36 claims
- 1874US6447717B1Composition and method for inhibition of metal corrosionDONLAR CORP·Filed 1999·Granted Sep 10, 2002·33 cites·14 claims
- 1973US5315010APolyaspartic acid manufactureDONLAR CORP·Filed 1993·Granted May 24, 1994·24 cites·2 claims
- 2072US5814582AMethod for enhanced plant productivityDONLAR CORP·Filed 1997·Granted Sep 29, 1998·24 cites·32 claims
- 2171US6277302B1Inhibition of metal corrosionDONLAR CORP·Filed 1998·Granted Aug 21, 2001·32 cites·23 claims
- 2270US5998492ASuper-absorbing polymeric networksDONLAR CORP·Filed 1998·Granted Dec 7, 1999·23 cites·19 claims
- 2370US5373086APolyaspartic acid having more than 50% β form and less that 50% α formDONLAR CORP·Filed 1994·Granted Dec 13, 1994·27 cites·4 claims
- 2469US5391764APolyaspartic acid manufactureDONLAR CORP·Filed 1994·Granted Feb 21, 1995·14 cites·7 claims
- 2567US5854177AMethod for enhanced hydroponic plant productivity with polymeric acidsDONLAR CORP·Filed 1997·Granted Dec 29, 1998·19 cites·16 claims
- 2667US5580840AMethod and composition for preservation of cut flowersDONLAR CORP·Filed 1995·Granted Dec 3, 1996·23 cites·6 claims
- 2766US5998491ASuper-absorbing polymeric networksDONLAR CORP·Filed 1998·Granted Dec 7, 1999·21 cites·18 claims
- 2866US5466779AProduction of polysuccinimideDONLAR CORP·Filed 1994·Granted Nov 14, 1995·14 cites·13 claims
- 2965US5646133APolyaspartic acid and its analogues in combination with insecticidesDONLAR CORP·Filed 1996·Granted Jul 8, 1997·12 cites·25 claims
- 3064US6197897B1Production of succinimide copolymers in cyclic carbonate solventDONLAR CORP·Filed 1999·Granted Mar 6, 2001·13 cites·2 claims
- 3163US5552516ASoluble, crosslinked polyaspartatesDONLAR CORP·Filed 1994·Granted Sep 3, 1996·25 cites·26 claims
- 3263US5521257AHydrolysis of polysuccinimide to produce low-color polyaspartic acid and salts thereofDONLAR CORP·Filed 1995·Granted May 28, 1996·16 cites·9 claims
- 3359US5709890APolyaspartic acid and its analogues in combination with insecticidesDONLAR CORP·Filed 1997·Granted Jan 20, 1998·9 cites·7 claims
- 3458US5939522AProduction of polysuccinimide and polyaspartate in thioether solventsDONLAR CORP·Filed 1997·Granted Aug 17, 1999·14 cites·25 claims
- 3557US5635447APolyorganic acids and their analogues to enhance herbicide effectivenessDONLAR CORP·Filed 1996·Granted Jun 3, 1997·9 cites·22 claims
- 3656US6399715B2Solution polymerizing aspartic acid and monomer to form succinimide copolymerDONLAR CORP·Filed 2001·Granted Jun 4, 2002·2 cites·1 claims
- 3755US5827512AMethod for the treatment of bronchial asthma and like hypersensitivity diseases by administration of anionic polymersDONLAR CORP·Filed 1997·Granted Oct 27, 1998·14 cites·19 claims
- 3854US5607623AInhibition of carbon dioxide corrosion of metalsDONLAR CORP·Filed 1995·Granted Mar 4, 1997·18 cites·7 claims
- 3952US5847013ASuperabsorbing polymeric networksDONLAR CORP·Filed 1997·Granted Dec 8, 1998·11 cites·5 claims
- 4047USRE36234EAspartic acid copolymers and their preparationDONLAR CORP·Filed 1997·Granted Jun 22, 1999·8 cites·2 claims
- 4146US5756595AProduction of polysuccinimide in cyclic carbonate solventDONLAR CORP·Filed 1997·Granted May 26, 1998·7 cites·19 claims
- 4246US5491213AProduction of polysuccinimideDONLAR CORP·Filed 1994·Granted Feb 13, 1996·6 cites·3 claims
- 4344US5939518APolyaspartate (salt) by polymerizing aspartic acid and hydrolyzingDONLAR CORP·Filed 1998·Granted Aug 17, 1999·6 cites·1 claims
- 4443US5872285AProduction of D,L-aspartic acidDONLAR CORP·Filed 1996·Granted Feb 16, 1999·2 cites·24 claims
- 4540US5681920AProcess for production of a polysuccinimide and derivatives thereofDONLAR CORP·Filed 1994·Granted Oct 28, 1997·4 cites·29 claims
- 4635US5939517AProduction of succinimide copolymers in cyclic carbonate solventDONLAR CORP·Filed 1998·Granted Aug 17, 1999·2 cites·20 claims
- 4733US5907057AProduction of D,L-aspartic acidDONLAR CORP·Filed 1998·Granted May 25, 1999·0 cites·1 claims
- 4832US6005069AProduction of polysuccinimide and derivatives thereof in a sulfur-containing solventDONLAR CORP·Filed 1996·Granted Dec 21, 1999·2 cites·22 claims
Join the waitlist — get patent alerts
Get an alert when DONLAR CORP files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →