US2687956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy
Assignee: Driver Harris Co
•
Filing: 1951-12-28
•
Granted: 1954-08-31
•
Expires: 1971-12-28
Abstract
No abstract record available.
Inventors
- 👤 James M Lohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:34
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058; H; H01; H01B; H01B1/00; H01B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A NICKEL-CHROMIUM ALLOY OF THE 80% NICKEL 20% CHROMIUM TYPE HAVING A GREATER TOLERANCE FOR IRON WITHOUT MATERIALLY AFFECTING ITS RESISTANCE TO OXIDATION AT ELEVATED TEMPERATURE CONSISTING OF ABOUT 20% CHROMIUM, FROM 0.2% TO 2% OF SILICON, FROM 0.05% TO 1% MANGANSES, FROM 0.20% TO 0.25% CARBON, FROM 0.1% TO 1% ALUMINUM, FROM 0.01% TO 0.2% CALCIUM, A TRACE TO 0.5% OF AT LEAST ONE RARE EARTH METAL, AND THE BALANCE NICKEL.
Claim 2
Dependent Claim
72 words
A NICKEL-CHROMIUM ALLOY OF THE 80% NICKEL 20% CHROMIUM TYPE HAVING A GREATER TOLERANCE FOR IRON WITHOUT MATERIALLY AFFECTING ITS RESISTANCE TO OXIDATION AT ELEVATED TEMPERATURE CONSISTING OF ABOUT 20% CHROMIUM, FROM 0.2% TO 2% OF SILICON, FROM 0.05% TO 1% MANGANSES, FROM 0.20% TO 0.25% CARBON, FROM 0.1% TO 1% ALUMINUM, FROM 0.01% TO 0.2% CALCIUM, A TRACE TO 0.5% OF AT LEAST ONE RARE EARTH METAL, AND THE BALANCE NICKEL.
References Cited (Backward Citations)
FR770112A
Cited
US2005431A
Cited
US2005433A
Cited
GB488926A
Cited
FR48507E
Cited
US2460590A
Cited
US2581420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |