Inflatable support appliance
Patent 3949438 Issued on April 13, 1976. Estimated Expiration Date: 
April 13, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 13, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1142876 2543218 2750606 3266064 3521311 3822425 InventorApplicationNo. 524871 filed on 11/18/1974US Classes:5/699, Having waterproof or allergenproof outer surface5/706, Having confined gas (e.g., air mattress)5/727, Sectional with regard to firmness5/939WITH MICROPOROUS MATERIALExaminersPrimary: Gilliam, Paul R.Assistant: Calvert, Andrew M. Attorney, Agent or FirmForeign Application Priority Data1973-11-20 UKAbstractThe disclosure relates to a support appliance in the form of a mattress formed from a resilient foam material having interconnecting air transmitting cells, the upper surface of the mattress having at least an impedance to gas flow whilst permitting transmission of water vapour from the outer to the inner side thereof for removal by air flow through the mattress effected by an air pump. | |
