US5403491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitor well hydrocarbon absorber and solidifier
Assignee: Individual
•
Filing: 1993-07-19
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Granted: 1995-04-04
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Expires: 2013-07-19
Abstract
Abstract A non-woven fabric cylinder adapted for insertion within a canister of screened casing pipe that is placed in underground monitor wells to collect and contain spilled or leaked hydrocarbons such as gasoline or diesel by absorbing same upon contact. The absorbed substance is solidified within the cylinder as a rubber-like mass. The consolidated mass is contained within the screened canister, will float indefinitely and is easily retrieved and handled for disposal. The cylinder will not leech solidified hydrocarbons when exposed to pressure limits used to determine landfill suitability.
Inventors
- 👤 Herbert W. Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:32
CPC Classifications
B; B09; B09C; B09C1/00; B09C1/007; B09C1/002; C; C09; C09K; C09K3/00; C09K3/32; B09C2101/00; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A method of collecting and removing hydrocarbons from an underground monitor well located proximate a fueling facility storage tank, comprising the steps of: providing an absorbent device having an exterior envelope of polypropylene fabric containing therein a polymer material that acts to absorb and solidify liquid hydrocarbon substances that come into contact with the envelope; placing the absorbent device within a screened canister adapted to be placed within the bore of the monitor well; tethering the screened canister for controlled lowering and raising within the monitor well; lowering the canister into the monitor well to the surface level of any liquid collected in the well; allowing hydrocarbons on the surface of the collected liquid to be absorbed and solidified as they pass through the screened canister and into contact with the absorbent device; removing the canister from the monitor well; replacing the absorbent device containing the solidified hydrocarbons from the canister; and disposing of the replaced absorbent device.
Claim 2
Independent Claim
158 words
A method of collecting and removing hydrocarbons from an underground monitor well located proximate a fueling facility storage tank, comprising the steps of: providing an absorbent device having an exterior envelope of polypropylene fabric containing therein a polymer material that acts to absorb and solidify liquid hydrocarbon substances that come into contact with the envelope; placing the absorbent device within a screened canister adapted to be placed within the bore of the monitor well; tethering the screened canister for controlled lowering and raising within the monitor well; lowering the canister into the monitor well to the surface level of any liquid collected in the well; allowing hydrocarbons on the surface of the collected liquid to be absorbed and solidified as they pass through the screened canister and into contact with the absorbent device; removing the canister from the monitor well; replacing the absorbent device containing the solidified hydrocarbons from the canister; and disposing of the replaced absorbent device.
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) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |