US4592843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removal of organometallics from wastewater
Assignee: ATK Launch Systems LLC
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Filing: 1984-10-03
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Granted: 1986-06-03
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Expires: 2004-10-03
Abstract
Abstract Organometallic compounds, such as 10, 10'-oxybisphenoxarsine, are removed from aqueous media by preferential absorption onto solid polyamide absorbents, such as Nylon, in the form of pellets, fibers, granules, film or coatings.
Inventors
- 👤 Lawrence J. Guilbault
- 👤 Thomas C. McEntee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:28
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/58; C02F1/28; C02F1/285; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909; Y10S210/911; Y10S210/912; Y10S210/914
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A method for reducing the concentration of organometallic nonionic compounds selected from the group consisting of organotin, organolead, organomercury, organoarsenic, organobismuth, organoselenium, organotellurium, and admixtures thereof from aqueous media, comprising contacting said aqueous media containing an initial concentration of at least one of said organometallic nonionic compounds with sufficient solid polyamide absorbent material to cause said polyamide material to absorb at least a portion of said organometallic compound from said media and separating said absorbent and said aqueous media folowing said contacting step to thereby obtain a concentration of said organometallic compound in said aqueous media that is lower than said initial concentration.
Claim 2
Independent Claim
103 words
A method for reducing the concentration of organometallic nonionic compounds selected from the group consisting of organotin, organolead, organomercury, organoarsenic, organobismuth, organoselenium, organotellurium, and admixtures thereof from aqueous media, comprising contacting said aqueous media containing an initial concentration of at least one of said organometallic nonionic compounds with sufficient solid polyamide absorbent material to cause said polyamide material to absorb at least a portion of said organometallic compound from said media and separating said absorbent and said aqueous media folowing said contacting step to thereby obtain a concentration of said organometallic compound in said aqueous media that is lower than said initial concentration.
Claim 3
Dependent Claim
11 words
The method of claim 1, wherein: said organometallic compound is organoarsenic.
Claim 4
Dependent Claim
11 words
The method of claim 2, wherein: said organoarsenic is 10, 10'-oxybisphenoxarsine.
Claim 5
Dependent Claim
11 words
The method of claim 3, wherein: said polyamide material is Nylon.
Claim 6
Dependent Claim
15 words
The method of claim 4, wherein: said Nylon is in the form of a fiber.
Claim 7
Dependent Claim
11 words
The method of claim 1, wherein: said polyamide material is Nylon.
Claim 8
Dependent Claim
33 words
The method of claim 1, wherein: said polyamide material is in the form of a member selected from the group consisting of a pellet, a fiber, a granule, a film, and a coating.
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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) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |