Prayon Development

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Records under this name other than patents Prayon Development holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

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Patent	Title	Status	Expires	Confidence
US 4,588,570	Method for the preparation of phosphoric acid and calcium sulphate Term ended Term ended no later than May 13, 2006 · Low confidence	Term ended	Term ended no later than May 13, 2006	Low confidence