US4421791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side release agent for coal cars
Assignee: ChampionX LLC
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Filing: 1981-11-25
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Granted: 1983-12-20
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Expires: 2001-11-25
Abstract
Abstract An anti-stick agent for use in preventing coal and other particulate products from freezing to contacted metal surfaces comprises a liquid hydrocarbon vehicle and at least about five percent by weight of a naturally occurring phospholipid substance such as lecithin.
Inventors
- 👤 George T. Kekish
- 👤 Carol B. Batton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:42
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/08; C; C09; C09K; C09K3/00; C09K3/18; C10; C10L; C10L9/00; C10L9/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
The method of reducing the freeze-adherence of coarse mineral particles to the metal surfaces of shipping containers, which method comprises the steps of applying to said surfaces a coating mixture of a naturally occurring phospholipid substance dispersed in a hydrocarbon liquid, in which the principal phospholipids have the structural formula: ##STR3## wherein R 1 and R 2 are fatty acyl radicals containing from 8 to 18 carbon atoms and wherein R 3 is selected from: ##STR4## wherein X is one or more phosphate groups linked to one or more sugar molecules and subsequently adding coarse mineral particles to the container.
Claim 2
Independent Claim
100 words
The method of reducing the freeze-adherence of coarse mineral particles to the metal surfaces of shipping containers, which method comprises the steps of applying to said surfaces a coating mixture of a naturally occurring phospholipid substance dispersed in a hydrocarbon liquid, in which the principal phospholipids have the structural formula: ##STR3## wherein R 1 and R 2 are fatty acyl radicals containing from 8 to 18 carbon atoms and wherein R 3 is selected from: ##STR4## wherein X is one or more phosphate groups linked to one or more sugar molecules and subsequently adding coarse mineral particles to the container.
Claim 3
Dependent Claim
27 words
The method according to claim 1 wherein said phospholipid substance is present in an amount of from about 5 to about 25% by weight of said vehicle.
Claim 4
Dependent Claim
13 words
The method according to claim 1 wherein said vehicle is a petroleum liquid.
Claim 5
Dependent Claim
14 words
The method according to claim 3 wherein said petroleum liquid is #2 Fuel Oil.
Claim 6
Dependent Claim
14 words
The method according to claim 3 wherein said petroleum liquid is White Mineral Oil.
Claim 7
Dependent Claim
20 words
The method according to claim 1 wherein both R 1 and R 2 contain from 16 to 18 carbon atoms.
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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |