Patent US2052603A successfully refreshed from Google Patents.
US3281287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant edge tool and method of making the same
Assignee: Sandvik AB
•
Filing: 1962-02-27
•
Granted: 1966-10-25
•
Expires: 1982-02-27
Abstract
No abstract record available.
Inventors
- 👤 Edstrom John Olof
- 👤 Bernstein Axel Vilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:36
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/54; B26B21/58; C; C21; C21D; C21D8/00; C21D8/02; C22; C22C; C22C38/00; C22C38/18; C22C38/40; Y; Y10; Y10S; Y10S148/00; Y10S148/902; Y10S148/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
THE METHOD OF MAKING A THIN FLEXIBLE CORROSION RESISTENT EDGE TOOL HAVING EXCELLENT CUTTING PROERTIES AND A VICKERS HARDNESS (500 GRAMS LOAD) FROM 700 TO 880, COMPRISING QUENCH-ANNEALING AN UNSTABLE AUSTENITIC NICKELCHROMIUM STEEL ALLOY CONTAINING UP TO 0.50% CARBON FROM A TEMPERATURE WITHIN THE RANGE 950*C. TO 1200*C., SAID ALLOY REMAINING FULLY AUSTENITIC AFTER SAID QUENCH-ANNEALING, COLD WORKING SAID QUENCH-ANNEALED ALLOY IN A PLURALITY OF STEPS WITHOUT INTERMEDIATE ANNEALING WITH A CROSS SECTIONAL AREA REDUCTION WIHTIN THE RANGE 75% TO 96% TO A THICKNESS OF FROM 0.05 TO 0.15 MM. AND A MARTENSITE CONTENT OF AT LEAST 70% THE REST BEING AUSTENITE, AND TO A THICKNESS OF FROM 0.05 TOO 0.15 MM. AND A MARTENSITE TEMPERING THE RESULTING COLD WORKED ALLOY WITHIN THE TEMPERATURE RANGE 350*C. TO 500*C. SAID ALLOY CONTAINING 0.10-0.36% CARBON, 6-8% NICKEL, 16-18% CHROMIUM, 0-1.2% MOLYBDENUM, 0-1.7% MANGANESE, 0-1.7% SILICON, 0-1% OF AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF COBALT, COPPER, ALUMINUM, TUNGSTEN, TITANIUM, VANADIUM, COLUMBIUM AND TANTALUM, THE BALANCE BEING IRON WITH THE USUAL IMPURITIES.
Claim 2
Independent Claim
172 words
THE METHOD OF MAKING A THIN FLEXIBLE CORROSION RESISTENT EDGE TOOL HAVING EXCELLENT CUTTING PROERTIES AND A VICKERS HARDNESS (500 GRAMS LOAD) FROM 700 TO 880, COMPRISING QUENCH-ANNEALING AN UNSTABLE AUSTENITIC NICKELCHROMIUM STEEL ALLOY CONTAINING UP TO 0.50% CARBON FROM A TEMPERATURE WITHIN THE RANGE 950*C. TO 1200*C., SAID ALLOY REMAINING FULLY AUSTENITIC AFTER SAID QUENCH-ANNEALING, COLD WORKING SAID QUENCH-ANNEALED ALLOY IN A PLURALITY OF STEPS WITHOUT INTERMEDIATE ANNEALING WITH A CROSS SECTIONAL AREA REDUCTION WIHTIN THE RANGE 75% TO 96% TO A THICKNESS OF FROM 0.05 TO 0.15 MM. AND A MARTENSITE CONTENT OF AT LEAST 70% THE REST BEING AUSTENITE, AND TO A THICKNESS OF FROM 0.05 TOO 0.15 MM. AND A MARTENSITE TEMPERING THE RESULTING COLD WORKED ALLOY WITHIN THE TEMPERATURE RANGE 350*C. TO 500*C. SAID ALLOY CONTAINING 0.10-0.36% CARBON, 6-8% NICKEL, 16-18% CHROMIUM, 0-1.2% MOLYBDENUM, 0-1.7% MANGANESE, 0-1.7% SILICON, 0-1% OF AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF COBALT, COPPER, ALUMINUM, TUNGSTEN, TITANIUM, VANADIUM, COLUMBIUM AND TANTALUM, THE BALANCE BEING IRON WITH THE USUAL IMPURITIES.
References Cited (Backward Citations)
US2795519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |