US2763544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium steel
Assignee: Nyby Bruk AB
•
Filing: 1951-11-02
•
Granted: 1956-09-18
•
Expires: 1971-11-02
Abstract
No abstract record available.
Inventors
- 👤 Wagner Anton Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
HEAT RESISTANT LOW ALLOYED CHRONIUM CONTAINING STEELS WITH A CHRONIUM CONTENT OF 0.1-10%, AT LEAST ONE OF THE ELEMENTS OF THE GROUP CONSISTING OF COPPER AND NICKEL IN AN AMOUNT FROM 0.1 TO 0.3%, AND A TOTAL CONTENT OF ALLOYING ELEMENTS NOT HIGHER THAN 15.5%, WHICH STEELS WHILE RETAINING THEIR GOOD HEAT RESISTANCE HAVE A LOW TENDENCY TOWARDS BRITTLENESS AND PARTICULARLY SUCH BRITTLENESS AS OCCURS AFTER STRESSING FOR LONG PERIODS AT ELEVATED TEMPERATURE, CHARACTERIZED BY A COBALT CONTENT OF FROM 0.1 TO 0.5%.
Claim 2
Dependent Claim
83 words
HEAT RESISTANT LOW ALLOYED CHRONIUM CONTAINING STEELS WITH A CHRONIUM CONTENT OF 0.1-10%, AT LEAST ONE OF THE ELEMENTS OF THE GROUP CONSISTING OF COPPER AND NICKEL IN AN AMOUNT FROM 0.1 TO 0.3%, AND A TOTAL CONTENT OF ALLOYING ELEMENTS NOT HIGHER THAN 15.5%, WHICH STEELS WHILE RETAINING THEIR GOOD HEAT RESISTANCE HAVE A LOW TENDENCY TOWARDS BRITTLENESS AND PARTICULARLY SUCH BRITTLENESS AS OCCURS AFTER STRESSING FOR LONG PERIODS AT ELEVATED TEMPERATURE, CHARACTERIZED BY A COBALT CONTENT OF FROM 0.1 TO 0.5%.
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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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |