Patent US4537638A successfully refreshed from Google Patents.
US4537638A
Expired / Lapsed
US
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Method for removal of undesirable organic matter
Assignee: Wyeth Holdings LLC
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Filing: 1984-06-06
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Granted: 1985-08-27
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Expires: 2004-06-06
Abstract
Abstract A method of removing undesirable organic matter, such as food soil, paint, or the like, comprises contacting the organic matter with imidazole, pyrazole, an alkyl or aryl substituted imidazole, an alkyl or aryl substituted pyrazole, or a mixture of two or more thereof. Compositions containing these compounds as the active ingredient are also disclosed.
Inventors
- 👤 Arthur W. Petersen
- 👤 Dennis T. Smialowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:06
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/28; C11D3/0005; C11D3/0057; C11D7/00; C11D7/22; C11D7/32; C11D7/3281
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A method for facilitating the removal of undesirable organic matter from a surface which comprises contacting said organic matter, with a substantially loosening effective amount of an active ingredient consisting essentially of from 1 to 25% by weight of a compound selected from imidazole, pyrazole, an alkyl or aryl substituted imidazole, an alkyl or aryl substituted pyrazole, or a mixture of two or more thereof, in the substantial absence of an alkali metal hydroxide, for a time sufficient to effect a substantial loosening of said organic matter and wherein said compound is in liquid form at use temperature.
Claim 2
Independent Claim
98 words
A method for facilitating the removal of undesirable organic matter from a surface which comprises contacting said organic matter, with a substantially loosening effective amount of an active ingredient consisting essentially of from 1 to 25% by weight of a compound selected from imidazole, pyrazole, an alkyl or aryl substituted imidazole, an alkyl or aryl substituted pyrazole, or a mixture of two or more thereof, in the substantial absence of an alkali metal hydroxide, for a time sufficient to effect a substantial loosening of said organic matter and wherein said compound is in liquid form at use temperature.
Claim 3
Dependent Claim
40 words
The method according to claim 1 wherein the compound is applied to said organic matter in dry form and the method is performed in the presence of heat to at least a temperature at which the compound is rendered liquid.
Claim 4
Dependent Claim
31 words
The method according to claim 1 wherein the organic matter-containing surface is first heated to a temperature above the melting point of the compound and the compound is then applied thereto.
Claim 5
Dependent Claim
19 words
The method according to claim 1 wherein the compound is applied to said organic matter in a liquid form.
Claim 6
Dependent Claim
13 words
The method according to claim 4 wherein the liquid form is a solution.
Claim 7
Dependent Claim
25 words
The method according to claim 1 wherein the compound is imidazole, 2-methylimidazole, 4-methylimidazole, 1,2-dimethylimidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2-isopropylimidazole, or a mixture of two or more thereof.
Claim 8
Dependent Claim
11 words
The method according to claim 1 wherein the compound is imidazole.
Claim 9
Dependent Claim
20 words
The method according to claim 1 wherein the organic matter is food soil and the surface is an oven surface.
Claim 10
Dependent Claim
21 words
The method according to claim 1 wherein the method is performed in the presence of heat after application of said compound.
References Cited (Backward Citations)
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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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |