The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 1992
Filed:
Aug. 16, 1990
Robert L Baker, Duncan, OK (US);
Larry D Billingsley, Duncan, OK (US);
Calvin L Stegemoeller, Duncan, OK (US);
Halliburton Company, Duncan, OK (US);
Abstract
A non-corrosive, non-metallic hatch apparatus is provided for use on a container having a container opening with a container flange surrounding the container opening. A hatch base includes a base flange complementary to and constructed to be bolted to the container flange. The hatch base has a hatch opening defined therethrough and includes a base thread surrounding the hatch opening. A non-metallic hatch lid includes a lid thread defined thereon which is complementary to the base thread so that the hatch lid can be attached to the hatch base to close the hatch opening by threaded engagement of the lid thread with the base thread.