Archived challenges

These are the challenges that have expired or been solved.

20 000.00 USD

Miracle Cure for Coal

Submission deadline: Feb 8, 2011

15 000.00 USD

Alternatives to triglycerides to structure oil in food emulsions

Submission deadline: Feb 2, 2011

150 000.00 USD

Kaolin extraction and processing

Submission deadline: Dec 6, 2010

7 500.00 USD

Improve the next generation of a business-class seat for planes

Submission deadline: Nov 30, 2010

15 000.00 USD

Folding Shoes for Tired Heels

Submission deadline: Oct 25, 2010

10 000.00 USD

Improved Chocolate

Submission deadline: Sep 16, 2010

5 000.00 USD

Novel way to recycle expandable polystyrene

Submission deadline: Sep 11, 2010

10 000.00 USD

Next generation fruit

Submission deadline: Aug 30, 2010

35 000.00 USD

Batteries Biodegradable in Sea Water

Submission deadline: Jun 30, 2010

50 000.00 USD

Ice thickness measurement

Submission deadline: Jun 27, 2010

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