Patent US3785807A successfully refreshed from Google Patents.
US3785807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a master alloy for use in aluminum casting processes
Assignee: BACKERUD INNOVATION BOX 5035 S-181 05 LIDINGO SWEDEN A SWEDISH CORP AB
•
Filing: 1971-04-27
•
Granted: 1974-01-15
•
Expires: 1991-04-27
Abstract
Abstract A method for producing a master alloy for use in aluminum casting processes in which an aluminum melt containing 0.02-6 percent by weight titanium and 0.01-2 percent by weight boron is produced under conditions under which the boron is bound to titanium in the form of titanium diboride, whereafter the melt containing titanium diboride is held under agitation at a temperature ranging from the melting point of the material to 900* C for a period of at least 15 minutes and at most 9 hours.
Inventors
- 👤 S Backerud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:32
CPC Classifications
C; C22; C22C; C22C21/00; C22C1/00; C22C1/02; C22C1/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
44 words
A method according to claim 1 wherein the cooling step comprises cooling the alloy melt to a temperature below the melting point of the alloy and then re-heating the cooled alloy to a temperature between the melting point of said alloy and 900* C.
Claim 2
Dependent Claim
32 words
A method according to claim 2 wherein the step of cooling the alloy melt to a temperature below the melting point of the alloy comprises casting the alloy melt into cooled moulds.
Claim 3
Dependent Claim
27 words
A method according to claim 1, wherein the titanium is present in an amount of 0.02-2 percent by weight, based on the total weight of the alloy.
Claim 4
Dependent Claim
27 words
A method according to claim 1, wherein the boron is present in an amount of 0.01-1 percent by weight, based on the total weight of the alloy.
Claim 5
Dependent Claim
18 words
A method according to claim 1, wherein the alloy melt is maintained at a temperature of 680*-720* C.
Claim 6
Dependent Claim
22 words
A method according to claim 6, wherein the alloy melt is maintained at 680*-720* C for from 45 minutes to 2.5 hours.
Claim 7
Dependent Claim
21 words
A method according to claim 1 wherein the step of preparing the alloy melt comprises dispersing titanium diboride in molten aluminum.
Claim 8
Dependent Claim
29 words
A method according to claim 1 wherein the step of preparing the alloy melt comprises adding titanium and boron to molten aluminum at a temperature above about 1,200* C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |