Struggling Eastman Kodak said Thursday that it and its subsidiaries have filed for Chapter 11 of the U.S. Bankruptcy Code to reorganize its business.

Kodak which has recently charged Samsung Electronics, HTC, and Apple for alleged patent infringement, faced challenges in making the transition to digital technology.

In November, the company lowered its revenue outlook for 2011 to up to US$6.4 billion, and said it expected losses in 2011 in the range of $400 million to $600 million from continuing operations. It reorganized its business structure earlier this month.

The company said in a statement that it and its U.S. subsidiaries filed voluntary petitions for Chapter 11 business reorganization in the U.S. Bankruptcy Court for the Southern District of New York.

In a bid to raise cash, the company has since July been "exploring strategic alternatives" including sale for its digital imaging patent portfolios to take advantage of increased demand for intellectual property. It said it had over 1,100 U.S. patents that are fundamental to the digital imaging industry.

Kodak evidently wants to take advantage of the frenzy to buy patents in the tech industry, which led for example to a consortium that included Apple, EMC, Ericsson, Microsoft, Research In Motion, and Sony to pay $4.5 billion for patents and patent applications of Nortel Networks last year. Google also announced in August that it would acquire Motorola Mobility for $12.5 billion with an eye to its patents.

The storied photography company said on Thursday that Chapter 11 gives it the best opportunities to maximize the value in two critical parts of its technology portfolio -- its digital capture patents, and its printing and deposition technologies.

Its digital capture patents, which are essential for a wide range of mobile and other consumer electronic devices that capture digital images, have generated over $3 billion of licensing revenues since 2003, the Rochester, New York company said.

Kodak claims to have licensed its digital imaging patents to more than 30 companies, including LG, Motorola, and Nokia.

Kodak on Wednesday filed a lawsuit against Samsung alleging infringements of its patents