US4693755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for removing asbestos-containing materials
Assignee: Individual
•
Filing: 1986-06-05
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Granted: 1987-09-15
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Expires: 2006-06-05
Abstract
Abstract Asbestos-containing materials can be removed from their substrate by (1) applying a composition containing a cellulosic polymer such as hydroxypropyl cellulose to said asbestos-containing material; (2) allowing the cellulosic polymer containing composition time to penetrate and wet the asbestos-containing material; and (3) removing the resulting wet asbestos-containing material by use of mechanical forces.
Inventors
- 👤 Bradley F. Erzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:53
CPC Classifications
B; B09; B09B; B09B3/00; B09B3/70; B08; B08B; B08B17/00; B09B3/30; B09B3/35; B09B2101/00; B09B2101/35
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A process for removing an asbestos-containing material from a substrate surface comprising the sequential steps of: applying to the asbestos-containing material, a composition comprised of from about 1 to about 30 percent by weight of a cellulosic polymer and from about 99 to about 70 percent by weight of a liquid carrier; allowing the resulting gel-like composition sufficient time to penetrate the asbestos-containing material and form a wet asbestos-containing/cellulosic polymer substance; subjecting the wet asbestos-containing/cellulosic polymer substance to mechanical forces selected from the group consisting of scraping, chiseling, impacting, scoring, shearing and vacuuming to separate the wet asbestos-containing/cellulosic polymer substance from its substrate surface and; collecting the resulting asbestos-containing debris for disposal.
Claim 2
Dependent Claim
112 words
A process for removing an asbestos-containing material from a substrate surface comprising the sequential steps of: applying to the asbestos-containing material, a composition comprised of from about 1 to about 30 percent by weight of a cellulosic polymer and from about 99 to about 70 percent by weight of a liquid carrier; allowing the resulting gel-like composition sufficient time to penetrate the asbestos-containing material and form a wet asbestos-containing/cellulosic polymer substance; subjecting the wet asbestos-containing/cellulosic polymer substance to mechanical forces selected from the group consisting of scraping, chiseling, impacting, scoring, shearing and vacuuming to separate the wet asbestos-containing/cellulosic polymer substance from its substrate surface and; collecting the resulting asbestos-containing debris for disposal.
Claim 3
Dependent Claim
125 words
A process for removing an asbestos-containing material from a substrate surface comprising the sequential steps of: applying to the asbestos-containing material, a composition comprised of from about 5 to about 20 percent by weight of a cellulosic polymer selected from the group consisting of hydroxypropyl cellulose, hydroxyethyl cellulose, methylcellulose, and carboxymethyl cellulose and from about 95 to about 80 percent by weight of water; allowing the resulting gel-like composition sufficient time to penetrate the asbestos-containing material and form a wet asbestos-containing/cellulosic polymer substance; subjecting the wet asbestos-containing/cellulosic polymer substance to mechanical forces selected from the group consisting of scraping, chiseling, impacting, scoring, cutting, shearing and vacuuming to separate the wet asbestos-containing/cellulosic polymer substance from its substrate surface; and collecting the resulting asbestos debris for disposal.
Claim 4
Dependent Claim
125 words
A process for removing an asbestos-containing material from a substrate surface comprising the sequential steps of: applying to the asbestos-containing material, a composition comprised of from about 5 to about 20 percent by weight of a cellulosic polymer selected from the group consisting of hydroxypropyl cellulose, hydroxyethyl cellulose, methylcellulose, and carboxymethyl cellulose and from about 95 to about 80 percent by weight of water; allowing the resulting gel-like composition sufficient time to penetrate the asbestos-containing material and form a wet asbestos-containing/cellulosic polymer substance; subjecting the wet asbestos-containing/cellulosic polymer substance to mechanical forces selected from the group consisting of scraping, chiseling, impacting, scoring, cutting, shearing and vacuuming to separate the wet asbestos-containing/cellulosic polymer substance from its substrate surface; and collecting the resulting asbestos debris for disposal.
Claim 5
Dependent Claim
147 words
A process for removing an asbestos-containing material from a substrate surface comprising the sequential steps of: mixing a cellulosic polymer selected from the group consisting of hydroxypropyl cellulose, hydroxyethyl cellulose, methylcellulose and carboxymethyl cellulose, with water to from an asbestos stripping composition comprised of from about 5 to about 20 percent by weight of the cellulosic polymer and from about 95 to about 80 percent water; spraying the asbestos stripping composition to the asbestos-containing material and allowing composition to form a gel-like composition; allowing the gel-like asbestos stripping composition at least two hours to penetrate the asbestos-containing material and form a wet asbestos-containing/cellulosic polymer substance; subjecting the wet asbestos-containing/cellulosic polymer substance to mechanical forces selected from the group consisting of scraping, chiseling, impacting, scoring, cutting, shearing and vacuuming to separate the wet asbestos-containing/cellulosic polymer substance from its substrate surface; and collecting the resulting asbestos-containing debris for disposal.
Claim 6
Dependent Claim
147 words
A process for removing an asbestos-containing material from a substrate surface comprising the sequential steps of: mixing a cellulosic polymer selected from the group consisting of hydroxypropyl cellulose, hydroxyethyl cellulose, methylcellulose and carboxymethyl cellulose, with water to from an asbestos stripping composition comprised of from about 5 to about 20 percent by weight of the cellulosic polymer and from about 95 to about 80 percent water; spraying the asbestos stripping composition to the asbestos-containing material and allowing composition to form a gel-like composition; allowing the gel-like asbestos stripping composition at least two hours to penetrate the asbestos-containing material and form a wet asbestos-containing/cellulosic polymer substance; subjecting the wet asbestos-containing/cellulosic polymer substance to mechanical forces selected from the group consisting of scraping, chiseling, impacting, scoring, cutting, shearing and vacuuming to separate the wet asbestos-containing/cellulosic polymer substance from its substrate surface; and collecting the resulting asbestos-containing debris for disposal.
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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) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |