(1)	Animal Safety acquisitions represents portion of 3M Food Safety transaction recorded at Neogen Australasia.

At November 30, 2022, non-amortizable assets included licenses of $569,000, trademarks of $13,423,000 and other intangibles of $1,224,000. At May 31, 2022, non-amortizable intangible assets included licenses of $569,000, trademarks of $13,604,000 and other intangibles of $1,224,000.

Amortizable intangible assets consisted of the following and are included in customer-based intangibles and other non-current assets within the consolidated balance sheets:


(in thousands)	Gross Carrying Amount		Less Accumulated Amortization		Net Carrying Amount

Licenses	$	16,979	$	6,394		10,585
Covenants not to compete		371		234		137
Patents		8,029		4,565		3,464
Customer relationships		1,234,202		49,735		1,184,467
Trade names and trademarks		121,135		1,417		119,718
Developed technology		296,897		11,000		285,897
Other product and service-related intangibles		26,947		4,701		22,245

November 30, 2022	$	1,704,560	$	78,046	$	1,626,514


Licenses	$	17,109	$	5,682	$	11,427
Covenants not to compete		846		671		175
Patents		8,347		4,583		3,764
Customer relationships		75,000		33,662		41,338
Trade names and trademarks		1,180		167		1,013
Developed technology		17,741		6,124		11,617
Other product and service-related intangibles		27,299		4,527		22,772

May 31, 2022	$	147,522	$	55,416	$	92,106

Amortization expense relating to

finite-lived intangible assets was $22.7 million and $2.4 million for the three months ended November 30, 2022 and 2021, respectively, and $25.1 million and $4.6 million for the six months ended November 30, 2022 and 2021, respectively.

The estimated amortization expense for each of the five succeeding fiscal years is as follows: $45.6 million remaining in 2023, $90.8 million in 2024, $90.3 million in 2025, $90.2 million in 2026 and $89.7 million in 2027 and $1.22 billion thereafter.

The amortizable intangible assets useful lives are 2 to 20 years for licenses, 3 to 10 years for covenants not to compete, 5 to 25 years for patents, 9 to 20 years for customer relationships, 10 to 25 years for trade names and trademarks, 10 to 20 years for developed technology and 5 to 15 years for other product and service-related intangibles. All definite-lived intangibles are amortized on a straight-line basis with the exception of definite-lived customer-based intangibles and product and service-related intangibles, which are amortized on either a straight-line or an accelerated basis.

The weighted average remaining amortization period for intangibles was 18 years at November 30, 2022 and eight years at May 31, 2022.