US2576229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel for tools operating at elevated temperatures
Assignee: Gebrueder Boehler and Co AG
•
Filing: 1948-02-27
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Granted: 1951-11-27
•
Expires: 1968-02-27
Abstract
No abstract record available.
Inventors
- 👤 Krainer Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:20
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A STEEL ALLOY FOR MAKING HOT-WORKING TOOLS, ESPECIALLY HOT-WORKING PRESSING DIES, CONSISTING ESSENTIALLY OF 0.1% TO 0.5% CARBON; 0.5% TO 2% CHROMIUM; 0.5% TO 2% VANADIUM; 0.3% TO 1.8% TUNGSTEN; 0.2% TO 1.7% MOLYBDENUM; THE TOTAL PERCENTAGE OF THE TUNGSTEN AND MOLYBDENUM CONTENTS NOT EXCEEDING 2%; THE REMAINDER IRON AND INCIDENTAL IMPURITIES.
Claim 2
Dependent Claim
52 words
A STEEL ALLOY FOR MAKING HOT-WORKING TOOLS, ESPECIALLY HOT-WORKING PRESSING DIES, CONSISTING ESSENTIALLY OF 0.1% TO 0.5% CARBON; 0.5% TO 2% CHROMIUM; 0.5% TO 2% VANADIUM; 0.3% TO 1.8% TUNGSTEN; 0.2% TO 1.7% MOLYBDENUM; THE TOTAL PERCENTAGE OF THE TUNGSTEN AND MOLYBDENUM CONTENTS NOT EXCEEDING 2%; THE REMAINDER IRON AND INCIDENTAL IMPURITIES.
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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |