US3772046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tio{11 {11 slurries having a high solids content
Assignee: KEMIRA Inc A GA CORP
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Filing: 1972-01-17
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Granted: 1973-11-13
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Expires: 1992-01-17
Abstract
Abstract Pigment slurries of 70% by weight solids contents are shown to have long term stability even when exposed to typical paper making chemicals such as calcium carbonate. The aqueous slurries are formulated with pigment containing a small but effective admixed amount of polyhydric alcohol and an alkanolamine, and with water which contains a small but effective amount of a second alkanol-amine which provides a slurry pH of at least 9.
Inventors
- 👤 Donald Edward Knapp
- 👤 Lindo Paul Nageroni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:18
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/041; C09C3/08; C09D; C09D17/00; C09D17/004; C09D17/007; C09D17/008; C01; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
Slurry according to claim 1, wherein the polyhydric alcohol is sorbitol and said first alkanolamine is triethanolamine.
Claim 2
Dependent Claim
31 words
Slurry according to claim 1, wherein said second alkanolamine is of the class consisting of monoethanolamine; aminoethylthanolamine; N-methylethanolamine; diethanolamine; dimethylethanolamine; diisopropylethanolamine; methyldiethanolamine; monoisopropanolamine; diisopropanolamine; morpholine; N-amino-propylmorpholine; 2-amino-2-methyl-1-propanol; 2-amino-1-butanol; 2-amino-2-methyl-1,3-propanediol; and tris(hydroxy-methyl)aminomethane.
Claim 3
Dependent Claim
21 words
Slurry according to claim 3, wherein said second alkanolamine is 2-amino-2-methyl-1-propanol and present in an amount of about 0.5% by weight.
Claim 4
Dependent Claim
31 words
Slurry according to claim 1, wherein said first alkanolamine is of the class consisting of mixed isopropanolamines; diisopropanolamine; diisopropylethanolamine; 2-amino-2-methyl-1, 3-propanediol; 2-amino-2-methyl-1-propanol; 2-amino-2-ethyl-1,3-pro-panediol; 2-dimethylamino-2-methyl-1-propanol; aminoethanolamine; diethylethanolamine; N-methylethanolamine; methyldiethanolamine; diglycolamine; and triethanolamine.
References Cited (Backward Citations)
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Cited
US3510334A
Cited
US3506466A
Cited
US3649323A
Cited
US3674528A
Cited
US3702773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |