US 12,185,720 B2
Chitooligosaccharides and methods for use in enhancing plant growth
R. Stewart Smith, Pewaukee, WI (US); and Ahsan Habib, Roanoke, VA (US)
Assigned to NOVOZYMES BIOAG A/S, Bagsvaerd (DK)
Filed by NOVOZYMES BIOAG A/S, Bagsvaerd (DK)
Filed on Sep. 7, 2021, as Appl. No. 17/467,752.
Application 17/467,752 is a continuation of application No. 16/236,746, filed on Dec. 31, 2018, granted, now 11,134,683.
Application 16/236,746 is a continuation of application No. 15/206,507, filed on Jul. 11, 2016, granted, now 10,206,396, issued on Feb. 19, 2019.
Application 15/206,507 is a continuation of application No. 14/709,769, filed on May 12, 2015, granted, now 9,414,592, issued on Aug. 16, 2016.
Application 14/709,769 is a continuation of application No. 13/625,393, filed on Sep. 24, 2012, granted, now 9,055,746, issued on Jun. 16, 2015.
Claims priority of provisional application 61/538,326, filed on Sep. 23, 2011.
Prior Publication US 2021/0400964 A1, Dec. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A01N 43/16 (2006.01); A01N 63/20 (2020.01); C05F 11/00 (2006.01)
CPC A01N 43/16 (2013.01) [A01N 63/20 (2020.01); C05F 11/00 (2013.01)] 20 Claims
 
1. A method, comprising introducing at least one chitin oligomer into a plant growth medium in an amount sufficient to enhance the growth and/or yield of a plant grown therein, wherein said at least one chitin oligomer comprises at least one chitin oligomer represented by the formula:

OG Complex Work Unit Chemistry
in which R1 represents hydrogen or methyl; R2 represents hydrogen or methyl; R3 represents hydrogen, acetyl or carbamoyl; R4 represents hydrogen, acetyl or carbamoyl; R5 represents hydrogen, acetyl or carbamoyl; R6 represents hydrogen, arabinosyl, fucosyl, acetyl, sulfate ester, 3-0-S-2-0-MeFuc, 2-0-MeFuc, or 4-0-AcFuc; R7 represents hydrogen, mannosyl or glycerol; R8 represents hydrogen, methyl, or —CH2OH; R9 represents hydrogen, arabinosyl, or fucosyl; R10 represents hydrogen, acetyl or fucosyl; and n represents 0, 1, 2 or 3.