Patent 4038700 Issued on August 2, 1977. Estimated Expiration Date: August 2, 1994. 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.
A safety helmet for motorcyclists or the like including a hard shell having a lining of flexible material behind which are disposed a plurality of air cushions interconnected by means of tubes provided with pressure equalization delay devices to provide a yielding engagement by the lining with the enclosed parts of the face and skull together with air-foil-like projections on the outer surface of the shell acted upon by an airstream to reduce the weight of the helmet.
August 2, 1994. 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.
