← Back to Patent Explorer
US4935594B1 Expired / Lapsed US ⏱️ 0.0 years remaining

Encoding electrode in particular a wire electrode for the sparkerosive working

Assignee: Berkenhoff and Co KG
•
Filing: 1988-10-21
•
Granted: 2000-01-04
•
Expires: 2008-10-21
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract (A) In the prodn. of an erosion electrode, esp. a wire electrode for spark erosion cutting of conductive materials, comprising a metal (alloy) core and one or more sheath layers of low evapn. temp. alloy (e.g. Zn-Cu), the novelty is that an active sheath layer of the alloy with low evapn. temp. and limited cold formability is produced by annealing the wire electrode to obtain an alloy layer with decreasing content of the low evapn. temp. metal extending from the outer rim of the sheath layer to the core and then cooling to fix this diffusion state. Also claimed is an erosion electrode, esp. a wire electrode in which the core consists of a homogeneous alloy and the sheath layer consists of an alloy with an alloy constituent concn. decreasing inwardly towards the core.

Inventors

  • 👤 Heinrich Groos
  • 👤 Hans Hermanni

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 03:49
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/22; C; C22; C22F; C22F1/00; C22F1/08; B23H7/02; B23H7/08

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2003-01-03 2003-07-05 2004-01-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2007-01-03 2007-07-05 2008-01-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2011-01-03 2011-07-05 2012-01-04 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag