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:
Oct. 13, 1981
Filed:
Oct. 02, 1979
Trefimetaux, Clichy, FR;
Abstract
A process and article of manufacture relating to drawn rods made of lead brass which has been subjected to at least one intermediate annealing treatment, the invention involves annealing at a temperature of between 425.degree. C. and a temperature which is 10.degree. lower than the solidus point for a period of between 1/100 of a second and one minute. The rods thus obtained contain uncoalesced lead particles having a dimension of less than 1.5 micrometers and contain at least 8000 of these lead particles per square millimeter and for each percent of lead. The rods produce fine shavings during machining and do not cause blocking on breakage. The present lead brass rods are particularly useful for automatic screw thread cutting.