Patents by Inventor Alexander LOF

Alexander LOF has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Stainless steel strip for flapper valves
    Patent number: 9890436
    Abstract: A cold rolled and hardened martensitic austenitic stainless steel strip for flapper valves in compressors is made from steel combining, in weight %(wt. %), the following elements: C: 0.3-0.5, Si: 0.2-0.8, Mn: 0.2-1.0, Cr: 12.0-15.0, Mo: 0.50-2.00, N: 0.02-0.15, and V: 0.01-0.20. The steel strip has a matrix consisting of tempered martensite and between 5 and 15 volume % austenite and a tensile strength (Rm) of 1970-2300 MPa. The steel strip has a thickness of 0.07-3 mm and a width of ?500 mm.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: February 13, 2018
    Assignee: VOESTALPINE PRECISION STRIP AB
    Inventors: Chris Millward, Azhar Nawaz, Alexander Lof
  • STAINLESS STEEL STRIP FOR FLAPPER VALVES
    Publication number: 20170335419
    Abstract: The invention relates to a cold roiled and hardened martensitic/austenitic stainless steel strip for flapper valves in the compressors, wherein the steel strip is made from steel combining, in weight % (wt. %), the following elements: C 0.3-0.5, Si 0.2-0.8, Mn 0.2-1.0, Cr 12.0-15.0, Mo 0.50-2.00, N 0.02-0.15, and V 0.01-0.20. The steel has a matrix consisting of tempered martensite and between 5 and 15 volume % austenite and a tensile strength (Rm) of 1970-2300 MPa.
    Type: Application
    Filed: December 8, 2015
    Publication date: November 23, 2017
    Inventors: Chris MILLWARD, Azhar NAWAZ, Alexander LOF