US4954544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified adhesive composition which undergoes color changes upon application
Assignee: Conros Corp
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Filing: 1989-03-03
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Granted: 1990-09-04
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Expires: 2009-03-03
Abstract
Abstract Adhesive compositions are provided containing additives which improve application characteristics and which undergo a color change upon application to a substrate. The adhesive composition is preferably in stick-form disposed in an applicator such as a reclosable tube dispenser.
Inventors
- 👤 Ashok K. Chandaria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:46
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; C09; C09J; C09J139/00; C09J139/04; C09J139/06; C09J9/00; C09J9/005; C08L; C08L2666/00; C08L2666/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
An adhesive composition, which upon application to a substrate, undergoes a change from colored to colorless, said composition comprised of: (a) polyvinylpyrrolidone in an aqueous organic medium with a soap forming gelling agent, p1 (b) a colored indicator additive which upon exposure to air becomes colorless, and which has the formula: ##STR2## wherein each R individually represents hydrogen or lower alkyl, (c) a carbamide, and (d) a non-ionic surfactant.
Claim 2
Dependent Claim
69 words
An adhesive composition, which upon application to a substrate, undergoes a change from colored to colorless, said composition comprised of: (a) polyvinylpyrrolidone in an aqueous organic medium with a soap forming gelling agent, p1 (b) a colored indicator additive which upon exposure to air becomes colorless, and which has the formula: ##STR2## wherein each R individually represents hydrogen or lower alkyl, (c) a carbamide, and (d) a non-ionic surfactant.
Claim 3
Dependent Claim
29 words
The adhesive composition of claim 1 wherein said indicator is present in an amount of about 0.01 to 5% by weight based on the total weight of said composition.
Claim 4
Dependent Claim
32 words
The adhesive composition of claim 2 wherein said carbamide and non-ionic surfactant are present in an amount of about 0.01 to 10% by weight based on the total weight of said composition.
Claim 5
Dependent Claim
12 words
The adhesive composition of claim 1 wherein said indicator additive is 3,3-bis(4-hydroxyphenyl)-l-(3H)-isobenzofuranone.
Claim 6
Dependent Claim
12 words
The adhesive composition of claim 1 wherein said indicator additive is 3,3-bis[4-hydroxy-2-methyl-5-(l-methylethyl)phenyl]-1-(3H)-isobenzofuranone.
Claim 7
Dependent Claim
11 words
The adhesive composition of claim 1 which is in stick form.
Claim 8
Dependent Claim
14 words
The adhesive composition of claim 6 which is contained within a reclosable tube dispenser.
Claim 9
Dependent Claim
13 words
The adhesive composition of claim 7 wherein said indicator additive is a 3,3-bis(p-hydroxyphenyl)-l-(3H)-isobenzofuranone
Claim 10
Dependent Claim
28 words
The adhesive composition of claim 8 wherein said indicator additive is present in an amount of from about 0.01 to about 2 percent by weight of said composition.
Claim 11
Dependent Claim
12 words
The adhesive composition of claim 7 wherein said indicator additive is 3,3-bis[4-hydroxy-2-methyl-5-(l-methylethyl)phenyl]-1-(3H)-isobenzofuranone.
Claim 12
Dependent Claim
28 words
The adhesive composition of claim 10 wherein said indicator additive is present in an amount of from about 0.01 to about 2 percent by weight of said composition.
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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) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |