US3869282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning nickel alloy by filtering
Assignee: Individual
•
Filing: 1974-03-20
•
Granted: 1975-03-04
•
Expires: 1994-03-20
Abstract
Abstract In casting alloys that are prone to the formation of dross such as single or complex oxides of one or more of the metals making up the alloy or crucible, such dross is filtered out by a ceramic filter positioned in the filler for the mold. More specifically, oxides formed in the melt are removed by a filter made up of ceramics formed from metal oxides since the oxides have a tendency to adhere to each other.
Inventors
- 👤 Patrick M Curran
- 👤 Geoffrey R Brazer
- 👤 John S Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:08
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/02; C22B9/023; B; B22; B22C; B22C9/00; B22C9/08; B22C9/086; B22D; B22D27/00; B22D27/04; B22D27/045; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
120 words
THE PROCESS OF CLEANING A MOLTEN NICKLE BASE ALLOY CONTAINING A DROSS SAID ALLOY INCLUDING AS AN ESSENTIAL ELEMENT A METAL SUBJECT TO OXIDATION DURING PREPARATION OF THE MOLTEN ALLOY AND SAID DROSS COMPRISING AN OXIDE, SAID METAL, BY REMOVING THE DROSS FROM THE ALLOY, SAID REMOVAL COMPRISING THE STEPS OF HEATING A CERAMIC FILLER CONSISTING OF A BED OF A PLURALITY OS SUBSTANTIALLY SPHERICAL CERAMIC PARTICLES MADE OF AN OXIDE, SAID BED HAVING MORE THAM ONE LAYER OF SAID CERAMIC PARTICLES IN CONTACT WITH ONE ANOTHER, AND POURING THE MOLTEN ALLOY CONTAINING DROS THROUGH SAID FILTER WHEREBY METAL OXIDES OF THE DROSS ARE CAUSED TO ADHERE TO THE PARTICLES AND BE RETAINER THEREBY, AND RECOVERING SUBSTANTIALLY DROSS FREE ALLOY.
Claim 2
Dependent Claim
120 words
THE PROCESS OF CLEANING A MOLTEN NICKLE BASE ALLOY CONTAINING A DROSS SAID ALLOY INCLUDING AS AN ESSENTIAL ELEMENT A METAL SUBJECT TO OXIDATION DURING PREPARATION OF THE MOLTEN ALLOY AND SAID DROSS COMPRISING AN OXIDE, SAID METAL, BY REMOVING THE DROSS FROM THE ALLOY, SAID REMOVAL COMPRISING THE STEPS OF HEATING A CERAMIC FILLER CONSISTING OF A BED OF A PLURALITY OS SUBSTANTIALLY SPHERICAL CERAMIC PARTICLES MADE OF AN OXIDE, SAID BED HAVING MORE THAM ONE LAYER OF SAID CERAMIC PARTICLES IN CONTACT WITH ONE ANOTHER, AND POURING THE MOLTEN ALLOY CONTAINING DROS THROUGH SAID FILTER WHEREBY METAL OXIDES OF THE DROSS ARE CAUSED TO ADHERE TO THE PARTICLES AND BE RETAINER THEREBY, AND RECOVERING SUBSTANTIALLY DROSS FREE ALLOY.
Claim 3
Dependent Claim
16 words
The process of claim 1 in which said metal is hafnium and said particles are alumina.
References Cited (Backward Citations)
US1472006A
Cited
US1972432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |