US2813788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-chromium-iron heat resisting alloys
Assignee: Huntington Alloys Corp
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Filing: 1955-12-29
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Granted: 1957-11-19
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Edmond N Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:02
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A CARBURIZING BOX CONSISTING ESSENTIALLY OF AN ALLOY CONTAINING ABOUT 41% TO 47% NICKLE, ABOUT 28% TO 32% CHROMIUM, WITH CARBON UP TO ABOUT 0.2%, TITANIUM UP TO ABOUT 1%, ALUMINUM UP TO ABOUT 0.5% AND THE BALANCE SUBSTANTIALLY ALL IRON, SAID ALLOY CONTAINING THE AFORESAID HIGH NIKEL AND CHROMIUM CONTENTS PROVIDING HIGH CARBURIZATION RESISTANCE WHEN SUBJECTED IN USE TO PROLONGED HEATING AT ELEVATED TEMPERATURES IN A CARBURIZONG ENVIRONMENT, HIGH SULFIDATION RESISTING QUALITIES AT HIGH TEMPERATURES, AND SUBSTANTIAL FREEDOM FROM EMBRITTLEMENT AFTER PROLONGED HEATING IN A TEMPERATURE RANGE OF ABOUT 1200* TO 1650*F.
Claim 2
Dependent Claim
93 words
A CARBURIZING BOX CONSISTING ESSENTIALLY OF AN ALLOY CONTAINING ABOUT 41% TO 47% NICKLE, ABOUT 28% TO 32% CHROMIUM, WITH CARBON UP TO ABOUT 0.2%, TITANIUM UP TO ABOUT 1%, ALUMINUM UP TO ABOUT 0.5% AND THE BALANCE SUBSTANTIALLY ALL IRON, SAID ALLOY CONTAINING THE AFORESAID HIGH NIKEL AND CHROMIUM CONTENTS PROVIDING HIGH CARBURIZATION RESISTANCE WHEN SUBJECTED IN USE TO PROLONGED HEATING AT ELEVATED TEMPERATURES IN A CARBURIZONG ENVIRONMENT, HIGH SULFIDATION RESISTING QUALITIES AT HIGH TEMPERATURES, AND SUBSTANTIAL FREEDOM FROM EMBRITTLEMENT AFTER PROLONGED HEATING IN A TEMPERATURE RANGE OF ABOUT 1200* TO 1650*F.
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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |