Patent US4409353A successfully refreshed from Google Patents.
US4409353A
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Easily dispersible composition for water soluble polymer
Assignee: Katayama Chemical Inc
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Filing: 1982-06-29
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Granted: 1983-10-11
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Expires: 2002-06-29
Abstract
Abstract An easily dispersible polymer composition which comprises a powder of a water soluble polymer having floculating property and a sodium sulfate hydrate, and optionally a magnesium sulfate hydrate and a hydroscopic agent and which shows a high degree of granularity and free-fluidity.
Inventors
- 👤 Osamu Umekawa
- 👤 Yosuke Ito
- 👤 Sakae Katayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:46
CPC Classifications
C; C08; C08L; C08L101/00; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08J2300/00; C08J2300/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
39 words
An easily dispersible composition having a high degree of granularity and free-fluidity which comprises a powder of a water-soluble polymer having flocculating ability and a hydrated sodium sulfate, and if required a hydrated magnesium sulfate and/or a hydroscopic agent.
Claim 2
Dependent Claim
39 words
An easily dispersible composition having a high degree of granularity and free-fluidity which comprises a powder of a water-soluble polymer having flocculating ability and a hydrated sodium sulfate, and if required a hydrated magnesium sulfate and/or a hydroscopic agent.
Claim 3
Dependent Claim
17 words
A composition of claim 1 wherein the water soluble polymer is a nonionic, anionic or cationic polymer.
Claim 4
Dependent Claim
30 words
A composition of claim 1 wherein the water soluble polymer is a nonionic polyacrylamide, an anionic partially hydrolyzed polyacrylamide or sodium carboxymethylcellulose, or cationic aminoethyl polyacrylate or cation modified polyacrylamide.
Claim 5
Dependent Claim
21 words
A composition of claim 1 wherein the hydrated sodium sulfate is the heptahydrate or decahydrate of sodium sulfate or mixture thereof.
Claim 6
Dependent Claim
20 words
A composition of claim 1 wherein the hydroscopic agent is sodium sulfate anhydride, potassium sulfate anhydride or magnesium sulfate anhydraide.
Claim 7
Dependent Claim
18 words
A composition of claim 1 wherein the hydrated magnesium sulfate is the hexahydrate or heptahydrate of magnesium sulfate.
Claim 8
Dependent Claim
29 words
A composition of claim 1, comprising 5 to 90 parts by weight of the water soluble polymer and 95 to 10 parts by weight of the hydrated sodium sulfate.
Claim 9
Dependent Claim
36 words
A composition of claim 1, comprising 5 to 90 parts by weight of the water soluble polymer and 95 to 10 parts by weight the hydrated sodium sulfate, the hydrated magnesium sulfate and the hygroscopic agent.
Claim 10
Dependent Claim
33 words
A composition of claim 1, comprising 5 to 90 parts by weight of the water soluble polymer and 95 to 10 parts by weight the hydrated sodium sulfate and the hydrated magnesium sulfate.
Claim 11
Dependent Claim
32 words
A composition of claim 1, comprising 5 to 90 parts by weight of the water soluble polymer and 95 to 10 parts by weight the hydrated sodium sulfate and the hygroscopic agent.
Claim 12
Dependent Claim
24 words
A composition of claim 9, wherein the ratio by weight of the hydrated sodium sulfate and the hydrated magnesium sulfate is 1:1 to 9:1.
Claim 13
Dependent Claim
23 words
A composition of claim 10 wherein the ratio by weight of the hydrated sodium sulfate and the hygroscopic agent is 1:2 to 5:1.
Claim 14
Dependent Claim
16 words
A composition of any of claims 1-12 which is a granula form having a free fluidity.
References Cited (Backward Citations)
US4080351A
Cited
US4251416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |