Patent 7709021 was granted and assigned to Lohmann & Rauscher on May, 2010 by the United States Patent and Trademark Office.
The invention relates to a wound dressing comprising a microbial-derived cellulose for treatment of specific types of chronic wounds, including pressure sores, venous and diabetic ulcers. The wound dressing is capable of donating liquid to dry substrates is also capable of absorbing exudating wounds.