JOHNSON & JOHNSON | 2013 | FY | 3

Intangible Assets and Goodwill
At the end of 2013 and 2012, the gross and net amounts of intangible assets were:
(Dollars in Millions)
 
2013
 
2012
Intangible assets with definite lives:
 
 

 
 

Patents and trademarks — gross
 
$
9,164

 
8,890

Less accumulated amortization
 
4,146

 
3,416

Patents and trademarks — net
 
$
5,018

 
5,474

Customer relationships and other intangibles — gross
 
$
19,027

 
18,755

Less accumulated amortization
 
4,872

 
4,030

Customer relationships and other intangibles — net
 
$
14,155

 
14,725

Intangible assets with indefinite lives:
 
 

 
 

Trademarks
 
$
7,619

 
7,648

Purchased in-process research and development
 
1,155

 
905

Total intangible assets with indefinite lives
 
$
8,774

 
8,553

Total intangible assets — net
 
$
27,947

 
28,752



Goodwill as of December 29, 2013 and December 30, 2012, as allocated by segment of business, was as follows:
(Dollars in Millions)
 
Consumer
 
Pharmaceuticals
 
Med Devices and Diagnostics
 
Total
Goodwill at January 1, 2012
 
$
8,298

 
1,721

 
6,119

 
16,138

Acquisitions
 
10

 
46

 
6,045

 
6,101

Currency translation/other
 
211

 
25

 
(51
)
 
185

Goodwill at December 30, 2012
 
$
8,519

 
1,792

 
12,113

 
22,424

Acquisitions
 
83

 
246

 
9

 
338

Currency translation/other
 
(71
)
 
30

 
77

 
36

Goodwill at December 29, 2013
 
$
8,531

 
2,068

 
12,199

 
22,798



The weighted average amortization periods for patents and trademarks and customer relationships and other intangible assets are 17 years and 24 years , respectively. The amortization expense of amortizable assets was $1,363 million, $1,146 million and $852 million before tax, for the fiscal years ended December 29, 2013, December 30, 2012 and January 1, 2012, respectively. The estimated amortization expense for the five succeeding years approximates $1,350 million before tax, per year. Amortization expense is included in cost of products sold.

During the fiscal year ended December 30, 2012, goodwill increased by $6.0 billion, related to the Synthes, Inc. acquisition. See Note 20 to the Consolidated Financial Statements for additional details on the Synthes, Inc. acquisition.

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