Patent US2834782A successfully refreshed from Google Patents.
US4426409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic polymers for use in freeze protection of coals and minerals
Assignee: ChampionX LLC
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Filing: 1982-07-02
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Granted: 1984-01-17
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Expires: 2002-07-02
Abstract
Abstract A method for treating fine particles such as minerals and coal particles having surface moisture to reduce the cohesive strength of such particulate particles when frozen which comprises spraying the particles prior to freezing with an effective amount of a dilute aqueous solution of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical. In a preferred embodiment of the invention, there is also included in the aqueous solution of the freezing point depressant polymer solution from 1/2 to about 5% by weight of gelatin or hydrolyzed gelatin.
Inventors
- 👤 William J. Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:16
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/08; B65; B65G; B65G3/00; B65G3/02; C; C09; C09K; C09K3/00; C09K3/18; C10; C10L; C10L9/00; C10L9/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
A method for treating particulate particles having surface moisture to reduce the cohesive strength of such particulate particles when frozen which comprises spraying the particulate particles prior to freezing with an effective amount of a dilute aqueous solution which contains about 1-10% by weight of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical.
Claim 2
Independent Claim
62 words
A method for treating particulate particles having surface moisture to reduce the cohesive strength of such particulate particles when frozen which comprises spraying the particulate particles prior to freezing with an effective amount of a dilute aqueous solution which contains about 1-10% by weight of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical.
Claim 3
Independent Claim
62 words
A method for treating coal particles having surface moisture to reduce the cohesive strength of such coal particles when frozen which comprises spraying the coal particles prior to freezing with an effective amount of a dilute aqueous solution which contains about 1-10% by weight of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical.
Claim 4
Independent Claim
62 words
A method for treating coal particles having surface moisture to reduce the cohesive strength of such coal particles when frozen which comprises spraying the coal particles prior to freezing with an effective amount of a dilute aqueous solution which contains about 1-10% by weight of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein the freezing point anti-freeze chemical is from the group consisting of water-soluble polyhydric alcohols and water-soluble salts.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein the water-soluble cationic polymer is polyDADMAC.
Claim 7
Dependent Claim
12 words
The method of claim 2 where the anti-freeze chemical is magnesium chloride.
Claim 8
Independent Claim
72 words
A method for treating coal particles having surface moisture to reduce the cohesive of such coal particles when frozen which comprises spraying the coal particles prior to freezing with an effective amount of a dilute aqueous solution which contains about 1-10% by weight of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical and from about 1/2-5% by weight of gelatin or hydrolyzed gelatin.
Claim 9
Independent Claim
72 words
A method for treating coal particles having surface moisture to reduce the cohesive of such coal particles when frozen which comprises spraying the coal particles prior to freezing with an effective amount of a dilute aqueous solution which contains about 1-10% by weight of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical and from about 1/2-5% by weight of gelatin or hydrolyzed gelatin.
Claim 10
Dependent Claim
47 words
A composition for treating particulate particles having surface moisture to prevent freezing together of such particles which composition comprises a dilute aqueous solution which contains about 1-10% by weight of water soluble cationic polymer which solution also contains a freezing point depressant amount of an anti-freeze chemical.
Claim 11
Dependent Claim
47 words
A composition for treating particulate particles having surface moisture to prevent freezing together of such particles which composition comprises a dilute aqueous solution which contains about 1-10% by weight of water soluble cationic polymer which solution also contains a freezing point depressant amount of an anti-freeze chemical.
Claim 12
Dependent Claim
20 words
The composition of claim 7 where the composition also contains from about 1/2-5% by weight of gelatin or hydrolized gelatin.
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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |