US4430441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold setting sand for foundry moulds and cores
Assignee: Individual
•
Filing: 1980-05-30
•
Granted: 1984-02-07
•
Expires: 2000-05-30
Abstract
Abstract A cold setting sand for moulds and cores comprises a refractory filler and an acid, wherein the acid used is organic acid with the dissociation constant of 10 -5 to 10 1 , with the components being contained therein in the following amounts, in percent by weight: ______________________________________ refractory filler from 95 to 99 organic acid from 1 to 5. ______________________________________
Inventors
- 👤 Sergei S. Zhukovsky
- 👤 July M. Junovich
- 👤 Viktor N. Pertsovsky
- 👤 Vyacheslav S. Kolesnikov
- 👤 Igor P. Renzhin
- 👤 Semen I. Rivkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:06
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
47 words
A cold setting sand comprising: from 95 to 99 weight percent of a refractory filler containing magnesium oxides, iron oxides, silicon oxides or mixtures thereof and from 1 to 5 weight percent of an organic acid having a dissociation constant of 10 -5 to 10 1 .
Claim 2
Dependent Claim
47 words
A cold setting sand comprising: from 95 to 99 weight percent of a refractory filler containing magnesium oxides, iron oxides, silicon oxides or mixtures thereof and from 1 to 5 weight percent of an organic acid having a dissociation constant of 10 -5 to 10 1 .
Claim 3
Dependent Claim
20 words
The sand of claim 1, also containing orthophosphoric acid in a ratio to said organic acid of 0.1:1 to 4:1.
Claim 4
Dependent Claim
17 words
The sand of claim 1, wherein said aromatic acid is a carboxylic acid or a sulfonic acid.
Claim 5
Dependent Claim
19 words
The sand of claim 1, wherein said filler contains from 2 to 100 percent by weight of said oxides.
Claim 6
Dependent Claim
15 words
The sand of claim 1, wherein said filler consists of chrome-magnesite, magnesite chrome or chrome-ironstone.
Claim 7
Dependent Claim
23 words
The sand of claim 1, wherein 5.0 to 100.0 percent by weight of said oxides have a particle size less than 0.1 mm.
Claim 8
Dependent Claim
26 words
A sand according to claim 1 comprising 95 to 99 percent by weight of chrome magnesite and 1 to 5 percent by weight of formic acid.
Claim 9
Dependent Claim
21 words
A sand according to claim 1 comprising 97 percent by weight of chrome-ironstone and 3 percent by weight of benzenesulfonic acid.
Claim 10
Dependent Claim
25 words
A sand according to claim 1 comprising 48.5 percent by weight each of chrome-magnesite and magnesite chrome and 3 percent by weight of maleic acid.
Claim 11
Dependent Claim
29 words
A sand according to claim 1, comprising 82 percent by weight of quartz sand, 15 percent by weight of magnesium oxides and 3 percent by weight of acetic acid.
Claim 12
Dependent Claim
21 words
A sand according to claim 1 comprising in weight percent: ______________________________________
Chrome-magnesite 97,
Maleic acid 1.5 and
Orthophosphoric acid 1.5.
______________________________________
Claim 13
Dependent Claim
21 words
A sand according to claim 1, comprising in weight percent: ______________________________________
Chrome-magnesite 96.7,
Maleic acid 3.0 and
Orthophosphoric acid 0.3.
______________________________________
Claim 14
Dependent Claim
18 words
A sand according to claim 1, comprising in weight percent: ______________________________________
Chrome-magnesite 99 and
Formic acid 1.
______________________________________
Claim 15
Dependent Claim
18 words
A sand according to claim 1, comprising in weight percent: ______________________________________
Chrome-magnesite 97 and
Formic acid 3.
______________________________________
Claim 16
Dependent Claim
18 words
A sand according to claim 1, comprising in weight percent: ______________________________________
Chrome-magnesite 95 and
Formic acid 5.
______________________________________
Claim 17
Dependent Claim
22 words
A sand according to claim 1, comprising in weight percent: ______________________________________
Quartz sand 82,
Magnesium Oxides 15 and
Acetic acid 3.
______________________________________
Claim 18
Dependent Claim
21 words
A sand according to claim 1, comprising in weight percent: ______________________________________
Chrome-magnesite 48.5,
Magnesite chrome 48.5 and
Maleic acid 3.
______________________________________
Claim 19
Dependent Claim
19 words
A sand according to claim 1, comprising in weight percent: ______________________________________
Chrome ironstone 97 and
Benzenesulfonic acid 3.
______________________________________
Claim 20
Dependent Claim
18 words
A sand according to claim 1, comprising in weight percent: ______________________________________
Magnesite-chrome 97 and
Formic acid 3.
______________________________________
Claim 21
Dependent Claim
21 words
A sand according to claim 1, comprising in weight percent: ______________________________________
Chrome-magnesite 97,
Maleic acid 0.6 and
Orthophosphoric acid 2.4.
______________________________________
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |