Patents by Inventor Jozsef Keri

Jozsef Keri 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).

  • Process for the preparation of active-mass of improved quality from active-mass wastes formed during the production of lead accumulators
    Patent number: 5062574
    Abstract: The invention relates to a process for the preparation of positive or negative active mass of lead accumulators by using the active mass separated from production-refuse plates and/or the active-mass wastes produced during production.According to the invention when positive active mass is prepared then positive active mass, while when the negative active-mass is prepared then negative active-mass, previously dried and heat-treated at a temperature of 500.degree. to 600.degree. C. and optionally ground, is fed into a lead-powder producing mill, together with metal lead, in an amount of at most 80% by mass calculated for the mass of the metal lead, and the product thus obtained is led into the plate production.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: November 5, 1991
    Assignee: Akkumulator-Es Szarazelemgyar
    Inventor: Jozsef Keri