Patent US4840734A successfully refreshed from Google Patents.
US4840734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for absorbing liquid leaks and spills
Assignee: Individual
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Filing: 1987-11-25
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Granted: 1989-06-20
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Expires: 2007-11-25
Abstract
Abstract A product for absorbing liquid leaks and spills includes at least one closed cell with a cell wall permeable to the liquid. An inorganic, inert absorbent is enclosed within the cell. Liquid contacting the product will pass through the cell wall and will be absorbed by the absorbent. A process for absorbing liquid leaks and spills is also provided.
Inventors
- 👤 Edward R. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:57
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28023; B01D; B01D15/00; B01J20/28033; B01J20/2805; C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; C09; C09K; C09K3/00; C09K3/32; E; E02; E02B; E02B15/00; E02B15/04; E02B15/10; E02B15/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A method for absorbing acidic liquid leaks and spills, comprising: contacting said acidic liquids with a product having at least one closed cell formed from an elongated tube having walls of an acid resistant fibrous material which is permeable to the acidic liquid, said tube having vermiculite in said tube as an absorbent in an amount sufficient to fill said tube to substantially restrict movement of individual vermiculite particles while permitting positioning of said tube, and end seams at both ends of said tube having inside end seams and outside end seams at both of said ends to contain said vermiculite therein; and removing said product after a quantity of acidic liquid has been absorbed.
Claim 2
Independent Claim
115 words
A method for absorbing acidic liquid leaks and spills, comprising: contacting said acidic liquids with a product having at least one closed cell formed from an elongated tube having walls of an acid resistant fibrous material which is permeable to the acidic liquid, said tube having vermiculite in said tube as an absorbent in an amount sufficient to fill said tube to substantially restrict movement of individual vermiculite particles while permitting positioning of said tube, and end seams at both ends of said tube having inside end seams and outside end seams at both of said ends to contain said vermiculite therein; and removing said product after a quantity of acidic liquid has been absorbed.
References Cited (Backward Citations)
US3414511A
Cited
US3617564A
Cited
US3739913A
Cited
US4483716A
Cited
US4497712A
Cited
US4659478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |