Searchable Maize and Corn Patent Data

What’s New


For the period Feb 7 through Feb 13, 2018, 

there are 2 newly-issued inbred patents

and 8 newly-issued hybrid patents.

The number of US-issued corn inbred and hybrid patents per decade has risen dramatically from:

     Decade              Inbred Patents      Hybrid Patents      Inbred Patents     Hybrid Patents

                                         Issued                  Issued                   Expired                Expired                                                                                                                    

  • 1986-1995                      76                            8                          13                               0
  • 1996-2005                    588                        167                          28                               8
  • 2006-2015                   1550                     1381                        141                              24
  • 2016-current                449                        428                        146                            145

On Dec 13, 2017, a new page was added to the web site, titled “Obtaining Seed”.  This page provides general information regarding how to obtain seed samples of patented and/or PVP-certified maize germplasm.  This page is not intended as an exhaustive list of ways in which to obtain seed.  However, it does provide some of the more common options.

There are currently over 700 patented corn inbreds for which PVP certificates have not been issued, and over 600 PVP-certified corn inbreds for which patents have not been issued.

CPIS has, through the month of September, 2016, updated our entire database in order to account for any patented corn germplasm for which patent maintenance fees were not paid, and which therefore have expired due to maintenance fee neglect according to the US Patent and Trademark Office.  As of Oct 4, 2016, this database update reflects an additional 25 corn inbred varieties and an additional 16 corn hybrid varieties for which patents had expired prematurely due to non-payment of patent maintenance fees.  These database updates are now henceforth reflected in any patent expiration date queries made.  Maintenance fee non-payment activities will henceforth be monitored, and will reflect in the ongoing weekly database updates.  To see if a particular patent has expired due to non-payment of maintenance fees, please check the Details page for an expired variety.  If an expired variety has a date listed for “Abandoned_Maintenance_Fee”, the patent was expired on the date listed.