Patent US4525515A successfully refreshed from Google Patents.
US4525515A
Expired / Lapsed
US
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Storage-stable, pumpable concentrated suspensions of water-soluble polymers
Assignee: Rhone Poulenc Specialites Chimiques
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Filing: 1983-07-25
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Granted: 1985-06-25
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Expires: 2003-07-25
Abstract
Abstract Storage-stable, pumpable, concentrated polymer suspensions, well adapted for use as thickening and flocculating agents, are comprised of (i) a water-soluble polymer, (ii) at least one water-soluble surfactant, and (iii) water, the amount of water being less than about 30% by weight of the total weight thereof.
Inventors
- 👤 Michel Peignier
- 👤 Claude Renault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:30
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08L; C08L33/00; C08L33/24; C08L33/26; C08L5/00; C09K8/58; C09K8/588; C08J2300/00; C08J2300/10; Y; Y10; Y10S; Y10S524/00; Y10S524/922
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
68 words
A storage-stable, pumpable, concentrated polymer suspension, comprising a suspension of (i) a particulate water-soluble polymer, in (ii) at least one water-soluble fluid surfactant having an HLB greater or equal to 10, and (iii) water, the amount of water being less than about 30% by weight of the total weight of said suspension, and the ratio by weight of said polymer (i) to said surfactant (ii) ranging from 20-90/80-10.
Claim 2
Dependent Claim
68 words
A storage-stable, pumpable, concentrated polymer suspension, comprising a suspension of (i) a particulate water-soluble polymer, in (ii) at least one water-soluble fluid surfactant having an HLB greater or equal to 10, and (iii) water, the amount of water being less than about 30% by weight of the total weight of said suspension, and the ratio by weight of said polymer (i) to said surfactant (ii) ranging from 20-90/80-10.
Claim 3
Dependent Claim
20 words
The concentrated suspension as defined by claim 1, comprising from 20 to 75% by weight of said water-soluble polymer (i).
Claim 4
Dependent Claim
13 words
The concentrated suspension as defined by claim 2, said ratio ranging from 30-70/70-30.
Claim 5
Dependent Claim
13 words
The concentrated suspension as defined by claim 3, said ratio ranging from 40-55/60-45.
Claim 6
Dependent Claim
27 words
The concentrated suspension as defined by claim 2, the amount of water (iii) being less than about 15% by weight of the total weight of said suspension.
Claim 7
Dependent Claim
20 words
The concentrated suspension as defined by claim 2, said water-soluble polymer (i) comprising an acrylic or methacrylic homopolymer or copolymer.
Claim 8
Dependent Claim
19 words
The concentrated suspension as defined by claim 2, said water-soluble polymer (i) comprising natural gum or modified natural gum.
Claim 9
Dependent Claim
20 words
The concentrated suspension as defined by claim 7, said water-soluble polymer (i) comprising a natural gum polysaccharide of microbial origin.
Claim 10
Dependent Claim
15 words
The concentrated suspension as defined by claim 8, said water-soluble polymer (i) comprising Xanthan gum.
Claim 11
Dependent Claim
18 words
The concentrated suspension as defined by claim 2, said water-soluble polymer (i) comprising an acrylamide or methacrylamide polymer.
Claim 12
Dependent Claim
15 words
The concentrated suspension as defined by claim 2, said surfactant (ii) comprising a non-ionic surfactant.
Claim 13
Dependent Claim
18 words
The concentrated suspension as defined by claim 11, said surfactant (ii) comprising a polyoxyethylenated aliphatic alcohol or alkylphenol.
Claim 14
Dependent Claim
15 words
The concentrated suspension as defined by claim 2, said surfactant (ii) comprising an anionic surfactant.
Claim 15
Dependent Claim
15 words
The concentrated suspension as defined by claim 2, said surfactant (ii) comprising a cationic surfactant.
Claim 16
Dependent Claim
15 words
The concentrated suspension as defined by claim 2, said surfactant (ii) comprising an amphoteric surfactant.
Claim 17
Dependent Claim
24 words
The concentrated suspension as defined by claim 2, said surfactant (ii) being polymer inert, wettable, and having an HLB value of at least 10.
Claim 18
Dependent Claim
32 words
In a process for the thickening or flocculating of a liquid medium, the improvement which comprises utilizing as the thickening or flocculating agent therefor, the concentrated suspension as defined by claim 1.
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |