US3291653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard facing treatment of steel bodies
Assignee: Paper Calmenson and Co
•
Filing: 1964-01-30
•
Granted: 1966-12-13
•
Expires: 1984-01-30
Abstract
No abstract record available.
Inventors
- 👤 Howard F Eilers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:07
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/12; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/20; C23C8/22; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12104; Y10T428/12111; Y10T428/12118; Y10T428/12125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF FORMING HARD FACING MATERIAL ON A SELECTED SURFACE OF A STEEL BODY WHICH COMPRISES: (A) HEATING SAID SURFACE TO THE CRITICAL TEMPERATURE AT WHICH SAID SURFACE BECOMES MOLTEN OF THE STEEL BODY; (B) APPLYING TO SAID HEAT SURFACE PARTICLES OF A HARD METAL CARBIDE IN A MATRIX COMPRISING A LOW CARBON STEEL ALLOY OF NICKEL, CHROMIUM AND MOLYBDENUM IN A MOLTEN STATE; (C) CAUSING SAID MOLTEN FACING MATERIAL TO SOLIDIFY; (D) CARBURIZING THE SOLIDIFIED HARD FACING MATERIAL AND METAL BODY SUPPORTING THE SAME TO A SUBSTANTIAL DEPTH, AND (E) REHEATING, QUENCHING AND DRAWING THE CARBURIZED BODY TO PROVIDE AN ABRASIVE HARD FACING THEREON CHARACTERIZED BY HIGH RESISTANCE TO SPALLING AND HIGH ELASTIC LIMIT.
Claim 2
Independent Claim
116 words
A METHOD OF FORMING HARD FACING MATERIAL ON A SELECTED SURFACE OF A STEEL BODY WHICH COMPRISES: (A) HEATING SAID SURFACE TO THE CRITICAL TEMPERATURE AT WHICH SAID SURFACE BECOMES MOLTEN OF THE STEEL BODY; (B) APPLYING TO SAID HEAT SURFACE PARTICLES OF A HARD METAL CARBIDE IN A MATRIX COMPRISING A LOW CARBON STEEL ALLOY OF NICKEL, CHROMIUM AND MOLYBDENUM IN A MOLTEN STATE; (C) CAUSING SAID MOLTEN FACING MATERIAL TO SOLIDIFY; (D) CARBURIZING THE SOLIDIFIED HARD FACING MATERIAL AND METAL BODY SUPPORTING THE SAME TO A SUBSTANTIAL DEPTH, AND (E) REHEATING, QUENCHING AND DRAWING THE CARBURIZED BODY TO PROVIDE AN ABRASIVE HARD FACING THEREON CHARACTERIZED BY HIGH RESISTANCE TO SPALLING AND HIGH ELASTIC LIMIT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |