Patent US5289858A successfully refreshed from Google Patents.
Patent US4680133A successfully refreshed from Google Patents.
US4680133A
Expired / Lapsed
US
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Stripping composition containing an amide and a carbonate and use thereof
Assignee: Air Products and Chemicals Inc
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Filing: 1986-03-26
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Granted: 1987-07-14
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Expires: 2006-03-26
Abstract
Abstract Stripping compositions for removing paints, varnishes, enamels and the like, from substrates comprising compositions of (a) an amide compound of the formula: ##STR1## and mixtures thereof, wherein R is selected from the group consisting of hydrogen, methyl, ethyl, propyl and phenyl; R 1 and R 2 are selected from the group consisting of hydrogen and methyl; and mixtures of said amide compounds; and (b) a carbonate compound of the formula: ##STR2## and mixtures thereof, wherein R 3 and R 4 are selected from the group consisting of methyl, ethyl or R 3 and R 4 together form a divalent ethylene, propylene or butylene group of a cyclic carbonate.
Inventors
- 👤 Irl E. Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:29
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5013; C09; C09D; C09D9/00; C11D7/22; C11D7/26; C11D7/266; C11D7/32
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
112 words
A stripping composition comprising a mixture of: (a) from about 25% to about 90% by weight of an amide compound of the formula: ##STR6## and mixtures thereof, wherein R is selected from the group consisting of hydrogen, methyl, ethyl, propyl and phenyl; R 1 and R 2 are selected from the group consisting of hydrogen and methyl; and (b) from about 10% to about 75% by weight a carbonate compound of the formula: ##STR7## and mixtures thereof, wherein R 3 and R 4 are selected from the group consisting of methyl or ethyl or R 3 and R 4 together form a divalent ethylene, propylene or butylene group of a cyclic carbonate.
Claim 2
Dependent Claim
112 words
A stripping composition comprising a mixture of: (a) from about 25% to about 90% by weight of an amide compound of the formula: ##STR6## and mixtures thereof, wherein R is selected from the group consisting of hydrogen, methyl, ethyl, propyl and phenyl; R 1 and R 2 are selected from the group consisting of hydrogen and methyl; and (b) from about 10% to about 75% by weight a carbonate compound of the formula: ##STR7## and mixtures thereof, wherein R 3 and R 4 are selected from the group consisting of methyl or ethyl or R 3 and R 4 together form a divalent ethylene, propylene or butylene group of a cyclic carbonate.
Claim 3
Dependent Claim
32 words
A stripping composition of claim 1 wherein the amide compound comprises from about 45 to about 85% by weight and the carbonate compound comprises from about 15 to about 55% by weight.
Claim 4
Dependent Claim
32 words
A stripping composition of claim 1 wherein the amide compound comprises from about 70 to about 75% by weight and the carbonate compound comprises from about 25 to about 30% by weight.
Claim 5
Dependent Claim
28 words
A stripping composition of claim 1 wherein the carbonate compound has the formula: ##STR8## wherein R 5 is selected from the group consisting of hydrogen, methyl or ethyl.
Claim 6
Dependent Claim
32 words
A stripping composition of claim 4 wherein the amide compound comprises from about 45 to about 85% by weight and the carbonate compound comprises from about 15 to about 55% by weight.
Claim 7
Dependent Claim
32 words
A stripping composition of claim 4 wherein the amide compound comprises from about 70 to about 75% by weight and the carbonate compound comprises from about 25 to about 30% by weight.
Claim 8
Dependent Claim
38 words
A stripping composition of claim 1 wherein the amide component is selected from the group consisting of dimethyl acetamide and dimethyl formamide and the carbonate component is selected from the group consisting of propylene carbonate and ethylene carbonate.
Claim 9
Dependent Claim
13 words
A stripping composition of claim 7 wherein the amide component is dimethyl acetamide.
Claim 10
Dependent Claim
13 words
A stripping composition of claim 7 wherein the amide component is dimethyl formamide.
Claim 11
Dependent Claim
16 words
A stripping composition of claim 8 comprising about 70% dimethyl acetamide and about 30% propylene carbonate.
Claim 12
Dependent Claim
16 words
A stripping composition of claim 9 comprising about 70% dimethyl formamide and about 30% propylene carbonate.
Claim 13
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 1, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 14
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 2, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 15
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 3, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 16
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 4, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 17
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 5, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 18
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 6, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 19
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 7, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 20
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 8, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 21
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 9, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 22
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 10, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
Claim 23
Dependent Claim
51 words
A process for removing a coating from a coated substrate comprising applying to said coated substrate a stripping effective amount of a stripping composition of claim 11, permitting said stripping composition to reside on said coated substrate for a stripping effective period of time and removing the coating from the substrate.
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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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |