US3929694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clear adhesive applicator crayon comprising agar and polyacrylamide
Assignee: Hexion Inc
•
Filing: 1974-10-10
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Granted: 1975-12-30
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Expires: 1994-10-10
Abstract
Abstract An adhesive applicator crayon contains water, polyacrylamide and agar. The adhesive applicator crayon is preferably prepared by first dissolving a sufficient amount of agar, and polyacrylamide in hot water. The solution gels sufficiently upon cooling for use as an adhesive applicator crayon. The adhesive applicator crayon is particularly useful in that the adhesive film produced by its use is non-toxic, transparent, low in cost and easy to manufacture.
Inventors
- 👤 Peter Spiros Columbus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:40
CPC Classifications
C; C09; C09J; C09J9/00; C09J9/005; C08; C08K; C08K3/00; C08K3/18; C08L; C08L33/00; C08L33/24; C08L5/00; C08L5/12; C09J133/00; C09J133/24; C08L2666/00; C08L2666/02; C08L2666/54
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
40 words
A SOLID ADHESIVE APPLICATOR CRAYON COMPRISING FROM ABOUT 0.5 TO ABOUT 5.0 PARTS OF AGAR, ABOUT 60 TO 95 PARTS OF WATER AND ABOUT 0.5 TO 36.0 PARTS OF POLYACRYLAMIDE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 50,000 TO 10,000,000.
Claim 2
Dependent Claim
40 words
A SOLID ADHESIVE APPLICATOR CRAYON COMPRISING FROM ABOUT 0.5 TO ABOUT 5.0 PARTS OF AGAR, ABOUT 60 TO 95 PARTS OF WATER AND ABOUT 0.5 TO 36.0 PARTS OF POLYACRYLAMIDE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 50,000 TO 10,000,000.
Claim 3
Dependent Claim
66 words
The solid adhesive applicator crayon of claim 1 wherein the polyacrylamide is a mixture of two polyacrylamides, one having a low molecular weight of from about 50,000 to 800,000 and is present at a level of about 0.5 to 30.0 parts and the second having a high molecular weight of 800,000 to 10,000,000 and is present at a level of from about 0.25 to 6.0 parts.
Claim 4
Dependent Claim
31 words
The solid adhesive applicatoR crayon of claim 2 wherein there is a difference in molecular weight of at least one million between the weight of one polyacrylamide and the second polyacrylamide.
Claim 5
Dependent Claim
70 words
The solid adhesive applicator crayon of claim 1 wherein the amount of agar is about 2.0 to 3.0 parts, the amount of water is from about 80 to 90 parts, the polyacrylamide comprises 5.0 to 10.0 parts of the one poly-acrylamide having a molecular weight of from about 100,000 to 300,000 and 2.0 to 4.0 parts of the second polyacrylamide having a molecular weight of 4 million to 7 million.
Claim 6
Dependent Claim
19 words
The solid adhesive applicator crayon of claim 1 containing from about 0.1 to about 5.0 parts of a humectant.
Claim 7
Dependent Claim
17 words
The solid adhesive applicator crayon of claim 1 containing from 0.1 to 1.0 parts of a preservative.
Claim 8
Dependent Claim
103 words
A process for the manufacture of a solid adhesive applicator crayon which comprises: A. mixing from about 0.5 to about 5.0 parts of agar, about 60 to 95 parts of water and about 0.5 to 36.0 parts of a polyacrylamide having a molecular weight of from about 50,000 to 10,000,000; B. heating the mixture to a temperature of about 90*C. but below its boiling point; C. cooling the mixture to below 90*C. but above 40*C; D. casting the mixture at a temperature above 40*C. into the form of a crayon; and E. cooling the cast mixture to below 40*C. to solidify the crayon.
Claim 9
Dependent Claim
103 words
A process for the manufacture of a solid adhesive applicator crayon which comprises: A. mixing from about 0.5 to about 5.0 parts of agar, about 60 to 95 parts of water and about 0.5 to 36.0 parts of a polyacrylamide having a molecular weight of from about 50,000 to 10,000,000; B. heating the mixture to a temperature of about 90*C. but below its boiling point; C. cooling the mixture to below 90*C. but above 40*C; D. casting the mixture at a temperature above 40*C. into the form of a crayon; and E. cooling the cast mixture to below 40*C. to solidify the crayon.
Claim 10
Dependent Claim
64 words
The method of claim 7 wherein the polyacrylamide is a mixture of two polyacrylamides, one having a low molecular weight of from about 50,000 to 800,000 and is present at a level of about 0.5 to 30.0 parts and the second having a high molecular weight of 800, 000 to 10,000,000 and is present at a level of from about 0.25 to 6.0 parts.
Claim 11
Dependent Claim
62 words
A propel-repel type solid adhesive applicator having a cap which seals the propel-repel applicator when not in use and a solid adhesive crayon positioned therein, said crayon comprising from about 0.5 to about 5.0 parts of agar, about 60 to 95 parts of water and about 0.5 to 36.0 parts of polyacrylamide having a molecular weight of from about 50,000 to 10,000,000.
Claim 12
Dependent Claim
62 words
A propel-repel type solid adhesive applicator having a cap which seals the propel-repel applicator when not in use and a solid adhesive crayon positioned therein, said crayon comprising from about 0.5 to about 5.0 parts of agar, about 60 to 95 parts of water and about 0.5 to 36.0 parts of polyacrylamide having a molecular weight of from about 50,000 to 10,000,000.
Claim 13
Dependent Claim
65 words
The solid adhesive crayon of claim 9 wherein the polyacrylamide is a mixture of two polyacrylamides, one having a low molecular weight of from about 50,000 to 800,000 and is present at a level of about 0.5 to 30.0 parts and the second having a high molecular weight of 800,000 to 10,000,000 and is present at a level of from about 0.25 to 6.0 parts.
Claim 14
Dependent Claim
31 words
The solid adhesive crayon of claim 10 wherein there is a difference in molecular weight of at least one million between the molecular weight of one polyacrylamide and the second polyacrylamide.
Claim 15
Dependent Claim
18 words
The solid adhesive crayon of claim 9 containing from about 0.10 to about 5.0 parts of a humectant.
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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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |