US4383868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of spillages of hazardous chemicals
Assignee: Individual
•
Filing: 1981-06-04
•
Granted: 1983-05-17
•
Expires: 2001-06-04
Abstract
Abstract A method of treating a spillage of a hazardous chemical in liquid form by contacting the liquid chemical with a solid particulate mixture comprising a polyacrylamide and a polymer or copolymer of an alkyl(alk)acrylate, and a solid particulate mixture for use in the said method.
Inventors
- 👤 Gordon K. Braley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:49
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; B; B01; B01J; B01J20/00; B01J20/22; B01J20/26; B01J20/261; C02; C02F; C02F1/00; C02F1/68; C02F1/681; C08L33/18; C08L33/20; C09; C09K; C09K3/00; C09K3/32; B01J2220/00; B01J2220/40; B01J2220/44; B01J2220/445; C02F1/28; C02F1/285; C02F1/288; C02F2103/00; C02F2103/007; C02F2103/06; C08L33/24; C08L33/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
59 words
A method of treating a spillage of a hazardous liquid chemical to immobilize the spillage thereby mitigating potentially harmful effects therefrom, which method comprises contacting the liquid chemical spillage with a solid particulate mixture consisting essentially of a first component of a polyacrylamide or a polyalkyl acrylamide and a second component of a polymer or copolymer of an alkyl(alk)acrylate.
Claim 2
Independent Claim
59 words
A method of treating a spillage of a hazardous liquid chemical to immobilize the spillage thereby mitigating potentially harmful effects therefrom, which method comprises contacting the liquid chemical spillage with a solid particulate mixture consisting essentially of a first component of a polyacrylamide or a polyalkyl acrylamide and a second component of a polymer or copolymer of an alkyl(alk)acrylate.
Claim 3
Dependent Claim
29 words
A method as claimed in claim 1 in which substantially the whole of the exposed surface of the liquid chemical is covered with a layer of the particulate mixture.
Claim 4
Dependent Claim
35 words
A method as claimed in claim 2 in which sufficient particulate mixture is used to form a solid layer on the surface of the liquid chemical or to form a gel with the liquid chemical.
Claim 5
Dependent Claim
18 words
A method as claimed in claim 1 in which the first component of the particulate mixture is polyacrylamide.
Claim 6
Dependent Claim
21 words
A method as claimed in claim 1 or 4 in which the second component of the particulate mixture is polymethyl methacrylate.
Claim 7
Dependent Claim
39 words
A method as claimed in claim 1 in which the particulate mixture contains 20% to 80% of polymer or copolymer of an alkyl(alk)acrylate by weight of the combined weight of the polyacrylamide and the polymer or copolymer of alkyl(alk)acrylate.
Claim 8
Dependent Claim
25 words
A method as claimed in claim 6 in which the particulate mixture contains 35% to 65% by weight of polymer or copolymer of an alkyl(alk)acrylate.
Claim 9
Dependent Claim
22 words
A method as claimed in claim 1 in which particle size of the solid particulate mixture is not greater than 5 mm.
Claim 10
Dependent Claim
23 words
A method as claimed in claim 1 in which the particle size of the solid particulate mixture is not greater than 3 mm.
Claim 11
Dependent Claim
31 words
A method as in claim 1 in which the solid particulate mixture further consists essentially of a third component of a solid material which promotes the flow properties of the mixture.
Claim 12
Dependent Claim
39 words
A method as claimed in claim 10 in which the solid flow-promoting component is present in the mixture in a proportion of 1% to 10% by weight of the total weight of the solid particulate components in the mixture.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |