← Back to Patent Explorer
US3761359A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for heat treating materials

Assignee: Individual
•
Filing: 1971-07-13
•
Granted: 1973-09-25
•
Expires: 1991-07-13
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract ENT ATMOSPHERES OF DIFFERENT COMPOSITION AND/OR DIFFERENT THERMAL VALUES CAN BE MAINTAINED IN THE RESPECTIVE COMPARTMENTS FOR CONTACT WITH THE LAYER. A TUNNEL FURNACE HAS AN ELONGATED FURNACE CHAMBER ALONG WHOSE BOTTOM A SUPPORT TRAVELS IN LONGITUDINAL DIRECTION. FROM THE ROOF TRANSVERSE PARTITIONS EXTEND DOWNWARDLY TOWARDS THE SUPPORT AND SUBDIVIDE THE SPACE ABOVE THE SAME INTO A PLURALITY OF INDIVIDUAL TREATING COMPARTMENTS. MATERIAL TO BE HEAT-TREATED IS DEPOSITED ON THE SUPPORT AS RELATIVELY THIN LAYER WHICH IS ADVANCED THROUGH THE CHAMBER SO THAT EACH INCREMENT OF THE LAYER BECOMES EXPOSED TO THE RESPECTIVE COMPARTMENT. THE COMPARTMENTS ARE PROVIDED WITH INLETS AND OUTLETS FOR GAS SO THAT DIFFER-

Inventors

  • 👤 Hippel H Von

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 22:27
CPC Classifications
C; C10; C10B; C10B7/00; C10B7/06; C10B49/00; C10B49/02; C10B49/04; C10B7/14

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) 1976-09-24 1977-03-26 1977-09-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-09-24 1981-03-26 1981-09-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-09-24 1985-03-26 1985-09-25 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag