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:
Feb. 04, 1992
Filed:
Jan. 03, 1991
John N Armor, Orefield, PA (US);
Thomas A Braymer, Allentown, PA (US);
Thomas S Farris, Bethlehem, PA (US);
Thomas R Gaffney, Allentown, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
Carbon molecular sieves, useful in the separation of air into oxygen and nitrogen, are improved through modification of the micropores of the sieve by contact with the pyrolysis products of a carbon-containing compound in the gaseous state diluted with helium, with or without nitrogen as a part of the diluting gas. Volatile organic compounds, such as trimethylcyclohexane, are used with the diluent gas to narrow the micropore openings of a carbon molecular sieve and increase its kinetic selectivity for oxygen adsorption. Carbon dioxide and helium or argon in the diluent gas are used to open pores available to contacting gases.