Patent US3836358A successfully refreshed from Google Patents.
US3836358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition agent
Assignee: Huntington Alloys Corp
•
Filing: 1973-07-16
•
Granted: 1974-09-17
•
Expires: 1993-07-16
Abstract
Abstract Composition and process for improving the castability of nickelchronium alloys with addition agent comprising nickel, chromium, iron, silicon and boron.
Inventors
- 👤 R Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:37
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/053; C22C19/007
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
10 words
An alloy having the chemical composition set forth in claim
Claim 2
Dependent Claim
50 words
A composition as set forth in claim 1 containing 30 to 45 percent nickel, 14 to 22 percent silicon, 2.5 to 5 percent boron, up to 0.15 percent carbon, up to 2 percent manganese, up to 5 percent phosphorus, up to 5 percent molybdenum and up to 5 percent copper.
Claim 3
Dependent Claim
67 words
A composition as set forth in claim 1 containing 40 to 50 percent nickel, 25 to 35 percent silicon, 3.5 to 5.5 percent boron, 16 to 22 percent chromium, up to 0.15 percent carbon, up to 2 percent manganese, up to 5 percent phosphorus, up to 6 percent molybdenum, up to 9 percent copper, and balaNce essentially iron in an amount of 10 percent to 20 percent.
Claim 4
Dependent Claim
55 words
A composition as set forth in claim 1 containing up to 20 percent nickel, 30 to 40 percent silicon, 5 to 9 percent boron, 16 to 20 percent chromium, up to 0.15 percent carbon, up to 2 percent manganese, up to 2 percent phosphorus, up to 10 percent molybdenum, and up to 5 percent copper.
Claim 5
Dependent Claim
40 words
A composition as set forth in claim 1 containing 30 to 40 percent nickel, 14 to 18 percent silicon, 2 to 3.5 percent boron, 20 to 25 percent chromium, up to 2 percent manganese, and up to 0.02 percent phosphorus.
Claim 6
Dependent Claim
54 words
An alloy in accordance with claim 2 consisting essentially of 30 to 40 percent nickel, 14 to 18 percent silicon, 2 to 3.5 percent boron, 20 to 25 percent chromium, up to 2 percent manganese, up to 0.5 percent copper, up to 0.5 percent molybdenum, up to 0.02 percent phosphorus and balance essentially iron.
Claim 7
Dependent Claim
74 words
A process for improving the castability characteristics of a nickel-chromium alloy comprising providing a furnace charge for a nickel-chromium alloy containing at least 7 percent nickel, at least 16 percent chromium and wherein the total of nickel and any iron present is at least 50 percent and characterized by a liquidus temperature of at least 2300*F. and adding to the furnace charge an addition agent having the chemical composition set forth in claim 1.
Claim 8
Dependent Claim
39 words
A process as set forth in claim 8 wherein the weight proportion of the amount of the added composition to the furnace charge is 5 to 25 parts of the added composition per 100 parts of the furnace charge.
Claim 9
Dependent Claim
75 words
A process for improving the castability characteristics of an austenitic nickel-chromium alloy comprising establishing a molten bath of an austenitic nickel-chromium alloy containing at least 7 percent nickel, at least 16 percent chromium and wherein the total of nickel and any iron present is at least 50 percent and characterized by a liquidus temperature of at least 2,300*F. and adding to said molten bath an alloy having the chemical composition set forth in claim 1.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |