Patent US3784177A successfully refreshed from Google Patents.
US3784177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for ladle additions
Assignee: METALLURG EXOPRODUCTS CORP
•
Filing: 1972-07-26
•
Granted: 1974-01-08
•
Expires: 1992-07-26
Abstract
Abstract A ladle for receiving molten metal is equipped with an elongated, refractory lined rod having an enlarged bottom portion and terminating at the lower end of the ladle. A plurality of stacked container means are positioned about the rod. These container means contain the desired addition agents. The molten metal is then teemed into the ladle and the container means and addition agents are consumed thereby.
Inventors
- 👤 G Rocher
- 👤 P Vayda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:22
CPC Classifications
B; B22; B22D; B22D1/00; B22D41/00; B22D41/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
A ladle for making additions to molten metal including a refractory lined apertured ladle, means to open and close the aperture of said ladle; a refractory lined rod extending within the ladle and terminating in an enlarged section at the lower end of said ladle; a plurality of stacked container means positioned about said rod on said enlarged section; and an addition agent positioned in at least certain of said container means.
Claim 2
Dependent Claim
72 words
A ladle for making additions to molten metal including a refractory lined apertured ladle, means to open and close the aperture of said ladle; a refractory lined rod extending within the ladle and terminating in an enlarged section at the lower end of said ladle; a plurality of stacked container means positioned about said rod on said enlarged section; and an addition agent positioned in at least certain of said container means.
Claim 3
Dependent Claim
41 words
The ladle of claim 1, said container means being torus shaped and annularly troughed so that in the stacked position, the bottom of a first container means shuts off the opening defined by the trough of a lower adjacent container means.
Claim 4
Dependent Claim
25 words
The ladle of claim 1, said container means made of a metal having a melting point similar to the molten metal intended for said ladle.
Claim 5
Dependent Claim
23 words
The ladle of claim 1, said container means made of an addition agent different from said addition agent positioned in said container means.
Claim 6
Dependent Claim
29 words
The ladle of claim 1, wherein layers of an addition agent different from said addition agent being retained in said container means being alternately interposed between adjacent container means.
Claim 7
Dependent Claim
33 words
The ladle of claim 1, said container means including a first section and a second section, said sections being independent and having connecting means so as to interconnect in forming the container means.
Claim 8
Dependent Claim
13 words
The ladle of claim 1 including a cover positioned on each container means.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |