Patent D508939 Issued on August 30, 2005. Estimated Expiration Date: August 30, 2019. 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
3517393
Protective goggle Patent #: 4977627 Issued on: 12/18/1990 Inventor: Metcalfe, et al.