Table 4.

Distribution of patents based on IPC classification

IPC code	Technology description	Patent %
C08J	Manufacture of articles or shaped materials containing macromolecular substances (manufacture of semi-permeable membranes, sheet for packaging)	13.23
C08K	Use of inorganic ingredients	13.23
C08L	Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons; materials for packaging & preservation	10.29
A61K	Use of chemical materials for deodorisation, disinfection or sterilisation	4.41
A22C	Processing of meat, poultry, or fish	3
A23L	Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs, packaging	3
A23C	Dairy products: milk, butter, cheese, milk or cheese substitutes, preservation of milk & milks products	3
A23B	Preserving: canning, meat, fish, eggs, fruit, vegetables, edible seeds; chemical ripening of fruit or vegetables; the preserved, ripened, or canned	1.5
A23J	Obtaining protein compositions for foodstuffs, bulk opening of eggs and separation of yolks from white	1.5
A01N	Preservation of plants or parts: inhibiting evaporation, improvement of the appearance of leaves (preservation or chemical ripening of harvested fruit or vegetables)	1.5

Total set of 69 patent records, IPC code as per WIPO IPC version 2012.01