US3982953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory casting, ramming or stamping mass
Assignee: Hoganas AB
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Filing: 1974-11-07
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Granted: 1976-09-28
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Expires: 1994-11-07
Abstract
Abstract This invention relates to a refractory mass of the art known per se for casting, ramming or stamping refractory linings and for metallurgical ladles or tapping channels, based on refractory grog and binder, to which mass there has been added straw-shaped, channel-forming elements, equally distributed throughout the mass, in sufficient amount to make possible rapid-drying.
Inventors
- 👤 Paul Lennart Ivarsson
- 👤 Ingvar Gustav Axel Blom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:33
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/66; C04B18/00; C04B18/04; C04B18/30; C04B18/305; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/0645; C04B38/065; C04B2111/00; C04B2111/00474; C04B2111/0087; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
In a refractory mass of the type used for casting, ramming or stamping refractory linings and for metallurgical ladles or tapping channels and composed of 60 to 95 % by weight of refractory grog and 40 to 5 % by weight of binder, the improvement which comprises said mass further containing 0.05 to 0.35 % by weight, based on the solids content of the mass without any additive, of straw-shaped, channel-forming elements equally distributed throughout the mass, whereby rapid drying of the mass is made possible.
Claim 2
Dependent Claim
86 words
In a refractory mass of the type used for casting, ramming or stamping refractory linings and for metallurgical ladles or tapping channels and composed of 60 to 95 % by weight of refractory grog and 40 to 5 % by weight of binder, the improvement which comprises said mass further containing 0.05 to 0.35 % by weight, based on the solids content of the mass without any additive, of straw-shaped, channel-forming elements equally distributed throughout the mass, whereby rapid drying of the mass is made possible.
Claim 3
Dependent Claim
94 words
In a refractory mass of the type used for casting, ramming, or stamping refractory linings and for metallurgical ladles or tapping channels and composed of 60 to 95 % by weight of refractory grog and 40 to 5 % by weight of binder, the improvement which comprises said mass further containing 0.05 to 0.35 % by weight, based on the solids content of the mass without any additive, of straw-shaped, channel-forming elements having a length within the range of 1-6 cm, said elements equally distributed throughout the mass, whereby rapid drying is made possible.
Claim 4
Dependent Claim
94 words
In a refractory mass of the type used for casting, ramming, or stamping refractory linings and for metallurgical ladles or tapping channels and composed of 60 to 95 % by weight of refractory grog and 40 to 5 % by weight of binder, the improvement which comprises said mass further containing 0.05 to 0.35 % by weight, based on the solids content of the mass without any additive, of straw-shaped, channel-forming elements having a length within the range of 1-6 cm, said elements equally distributed throughout the mass, whereby rapid drying is made possible.
Claim 5
Dependent Claim
19 words
The refractory mass of claim 2, wherein the amount of channel-forming elements is 0.1 to 0.25 % by weight.
Claim 6
Dependent Claim
16 words
The refractory mass of claim 2, wherein the channel-forming elements are cut straws of common cereals.
Claim 7
Dependent Claim
31 words
The refractory mass of claim 4, wherein the channel-forming elements consist of about 0.1 to about 0.25 % by weight of chopped wheat straw having a length of about 2 cm.
Claim 8
Dependent Claim
53 words
The refractory mass of claim 5, composed of 75 % by weight of corundum as the grog, 25 % by weight of calcium aluminate cement as the binder, and 0.2 % by weight, base on the combined weight of grog and binder of wheat straw chopped to a length of about 2 cm.
Claim 9
Dependent Claim
65 words
The refractory mass of claim 5, composed of 95 % by weight of high alumina grog, 5 % by weight of bonding clay, 7 % by weight of 80 % phosphoric acid as a binder, and 0.2 % by weight of wheat straw chopped to a length of about 2 cm, all weights being based on the combined weight of alumina grog and bonding clay.
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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |