Patent US3116180A successfully refreshed from Google Patents.
US3116180A
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US
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Method of producing articles having a cutting edge portion and consisting of stainless chromium steel
Assignee: FA NEUZEUGHAMMER AMBOSSWERK MESSER- und STAHLWARENFABRIK MALZACHER K G
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Filing: 1960-03-01
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Granted: 1963-12-31
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Expires: 1980-03-01
Abstract
No abstract record available.
Inventors
- 👤 Malzacher Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:05
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; Y; Y10; Y10S; Y10S148/00; Y10S148/902; Y10S148/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF PRODUCING KNIFE BLADES OF HARDENABLE STAINLESS STEEL CONTAINING AT LEAST 13% CHROMIUM AND HAVING A HYPREUTECTOID INITIAL STRUCTURE WITH A CARBON CONTENT OF MORE THAN 0.25%, SAID STEEL HAVING A CUTTING AND PORTION WITH HIGH WEAR RESISTANCE AND CUTTING AND ELASTIC PROPERTIES, COMPRISING THE STEPS OF HOT-FORMING SAID BLADES, THEREAFTER COLD-DEFORMING OF SAID CUTTING EDGE PORTION OF SAID BLADES TO A REDUCTION OF TRHICKNESS BY AT LEAST 5 PERCENT, SUBSEQUENTLY HEATING SAID BLADES TO A TEMPERATURE OF 50*C. TO NOT MORE THAN 100*C. ABOVE THE AUSTENITE FORMING TGEMPERATURE, AND THEN QUENCHING SAID BLADES TO THE POINT OF ACHIEVING MARTENSITE.
Claim 2
Independent Claim
102 words
A METHOD OF PRODUCING KNIFE BLADES OF HARDENABLE STAINLESS STEEL CONTAINING AT LEAST 13% CHROMIUM AND HAVING A HYPREUTECTOID INITIAL STRUCTURE WITH A CARBON CONTENT OF MORE THAN 0.25%, SAID STEEL HAVING A CUTTING AND PORTION WITH HIGH WEAR RESISTANCE AND CUTTING AND ELASTIC PROPERTIES, COMPRISING THE STEPS OF HOT-FORMING SAID BLADES, THEREAFTER COLD-DEFORMING OF SAID CUTTING EDGE PORTION OF SAID BLADES TO A REDUCTION OF TRHICKNESS BY AT LEAST 5 PERCENT, SUBSEQUENTLY HEATING SAID BLADES TO A TEMPERATURE OF 50*C. TO NOT MORE THAN 100*C. ABOVE THE AUSTENITE FORMING TGEMPERATURE, AND THEN QUENCHING SAID BLADES TO THE POINT OF ACHIEVING MARTENSITE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |