Patent US4390451A successfully refreshed from Google Patents.
US4390451A
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Concentrated aqueous metal aldonate and/or ammonium aldonate composition
Assignee: Akzo NV
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Filing: 1981-06-16
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Granted: 1983-06-28
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Expires: 2001-06-16
Abstract
Abstract The present invention relates to a concentrated aqueous composition of metal aldonate and/or ammonium aldonate. Part of the aldonate is dissolved and part of it is suspended in the water. Sodium gluconate is preferred. The present composition should contain a colloidally dispersed gum as suspending agent. Gums containing carboxyl groups such as xanthan gum are particularly well suited for making the suspension. In this manner, stable compositions having a high aldonate content are obtained. The composition can be used in cleansing preparations for glass and metal surfaces, in solution for etching aluminum, in galvanizing processes, in the tanning of leather, in paper making, in treatment of textiles, in paint removers, fixing baths in photography, and in agricultural and pharmaceutical preparations.
Inventors
- 👤 Reginoldus Havinga
- 👤 Reinder Torenbeek
- 👤 Petrus H. M. Schreurs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:15
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/01; C07C59/10; C07C59/105
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
52 words
A concentrated aqueous composition, comprising an aldonate of at least one member selected from the group consisting of a metal aldonate and an ammonium aldonate, part of said aldonate being present in a dissolved state and part of said aldonate being present in a suspended state; and a colloidal gum suspending agent.
Claim 2
Dependent Claim
52 words
A concentrated aqueous composition, comprising an aldonate of at least one member selected from the group consisting of a metal aldonate and an ammonium aldonate, part of said aldonate being present in a dissolved state and part of said aldonate being present in a suspended state; and a colloidal gum suspending agent.
Claim 3
Dependent Claim
16 words
The composition according to claim 1, containing at least 10 percent by weight of suspended aldonate.
Claim 4
Dependent Claim
13 words
The composition of claim 1, containing 20-60 percent by weight of suspended aldonate.
Claim 5
Dependent Claim
14 words
The composition of claim 1, 2 or 3, wherein the aldonate is a gluconate.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein the aldonate is sodium gluconate.
Claim 7
Dependent Claim
17 words
The composition of claim 4, wherein the composition comprises a gum having carboxyl groups as suspending agent.
Claim 8
Dependent Claim
17 words
The composition of claim 5, wherein the aldonate is sodium gluconate and the gum contains carboxyl groups.
Claim 9
Dependent Claim
15 words
The composition of claim 6 or claim 7 wherein the suspending agent is xanthan gum.
Claim 10
Dependent Claim
12 words
The composition of claim 6 or claim 7, further comprising a biocide.
Claim 11
Dependent Claim
10 words
The composition of claim 9, wherein the biocide is formaldehyde.
Claim 12
Dependent Claim
22 words
A substantially stable aqueous suspension comprising an aldonate in solution, a colloidal gum suspending agent, and an aldonate suspended in the solution.
Claim 13
Dependent Claim
22 words
A substantially stable aqueous suspension comprising an aldonate in solution, a colloidal gum suspending agent, and an aldonate suspended in the solution.
Claim 14
Dependent Claim
56 words
A process for preparing a substantially stable saturated aqueous solution containing suspended aldonate which comprises stirring in water containing a colloidal gum suspending agent an aldonate in an amount exceeding the solubility of the aldonate in water at the temperature of the water until a saturated solution of aldonate having undissolved aldonate suspended therein is obtained.
Claim 15
Dependent Claim
56 words
A process for preparing a substantially stable saturated aqueous solution containing suspended aldonate which comprises stirring in water containing a colloidal gum suspending agent an aldonate in an amount exceeding the solubility of the aldonate in water at the temperature of the water until a saturated solution of aldonate having undissolved aldonate suspended therein is obtained.
Claim 16
Dependent Claim
49 words
The process of claim 12 wherein the aldonate is a gluconate, the temperature of the water is from about 15° C. to about 100° C. and 0.05 to 5 percent by weight of a gum having carboxyl groups is mixed with the aldonate and water as a suspending agent.
Claim 17
Dependent Claim
13 words
The process of claim 13 wherein a biocide is included in the suspension.
Claim 18
Dependent Claim
30 words
A suspension saturated with a metal aldonate or an ammonium aldonate solute, having undissolved metal aldonate or ammonium aldonate substantially uniformly suspended therein and a pH of at least 6.
Claim 19
Dependent Claim
30 words
A suspension saturated with a metal aldonate or an ammonium aldonate solute, having undissolved metal aldonate or ammonium aldonate substantially uniformly suspended therein and a pH of at least 6.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |