Patent US4699666A successfully refreshed from Google Patents.
US4699666A
Expired / Lapsed
US
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Composition and method for de-installing asbestos coatings
Assignee: WEISBERG HERBERT B
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Filing: 1986-04-09
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Granted: 1987-10-13
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Expires: 2006-04-09
Abstract
Abstract A debilitant composition of water and a homopolymer of ethylene oxide having a molecular weight of from about 100,000 to about 5,000,000 and having a repeating monomeric unit with a molecular weight of 44 is applied to a body of previously installed asbestos insulation in sufficient quantity to thoroughly wet at least the exposed portion thereof. Thereafter, the pre-wet body is mechanically debrided.
Inventors
- 👤 John C. Tidquist
- 👤 Herbert B. Weisberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:58
CPC Classifications
B; B08; B08B; B08B17/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A method of removing a previously installed body of asbestos insulation which comprises the steps of: providing a debilitant composition of water and a homopolymer of ethylene oxide having a molecular weight of from about 100,000 to about 5,000,000 and having a repeating monomeric unit with a molecular weight of 44; treating a said body of previously installed asbestos insulation with a sufficient quantity of said composition to thoroughly wet at least the exposed portion of said body; and mechanically debriding said treated body.
Claim 2
Independent Claim
84 words
A method of removing a previously installed body of asbestos insulation which comprises the steps of: providing a debilitant composition of water and a homopolymer of ethylene oxide having a molecular weight of from about 100,000 to about 5,000,000 and having a repeating monomeric unit with a molecular weight of 44; treating a said body of previously installed asbestos insulation with a sufficient quantity of said composition to thoroughly wet at least the exposed portion of said body; and mechanically debriding said treated body.
Claim 3
Dependent Claim
16 words
A method according to claim 1 wherein said debilitant composition further includes an organic humectating agent.
Claim 4
Dependent Claim
14 words
A method according to claim 2 wherein said organic humectating agent is propylene glycol.
Claim 5
Dependent Claim
31 words
A method according to claim 1 wherein said debilitant composition is a liquid having a viscosity of from about 30 to about 40 centipoises and wherein said treatment is by spraying.
Claim 6
Dependent Claim
27 words
A method according to claim 1 wherein said homopolymer is present in said debilitant composition in an amount of from about 0.1% to about 5.0% by weight.
References Cited (Backward Citations)
GB1525465A
Cited
US4347150A
Cited
US4529449A
Cited
US4548729A
Cited
JPS6150474A
Cited
US4632847A
Cited
US4647314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |