US2559043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starch adhesive sheet material and composition therefor
Assignee: 3M Co
•
Filing: 1947-11-26
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Granted: 1951-07-03
•
Expires: 1967-11-26
Abstract
No abstract record available.
Inventors
- 👤 Nestor Leonard Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:12
CPC Classifications
C; C09; C09J; C09J103/00; C09J103/04; C09J103/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A WATER-ACTIVATIBLE ADHESIVE SHEET MATERIAL, CHARACTERIZED BY RAPID AND UNIFORM ACTIVATION UPON MOISTENING WITH WATER, COMPRISING A FLEXIBLE BACKING AND A THIN, NORMALLY NON-TACKY DRIED SURFACE COATING OF AN ADHESIVE COMPOSITION COMPRISING AN ALKALINE-REACTING STARCH BASE ADHESIVE FORMED BY HOLDING A SLURRY OF STARCH IN AN AQUEOUS SOLUTION OF AN OXIDIZING AGENT BELOW THE TEMPERATURE REQUIRED TO GELATINIZE THE STARCH, TO BRING THE STARCH MIXTURE IN AN ACIDIC CONDITION TO A POINT AT WHICH IT IS ALKALI-CONVERTIBLE TO AN ADHESIVE MASS HAVING A VISCOSITY AS HEREIN SPECIFIED, AND THEREUPON ADDING ALKALI TO CONVERT THE SAID ACIDIC STARCH MIXTURE TO A SMOOTH, HOMOGENEOUS, ALKALINE SOLUTION HAVING A VISCOSITY WITHIN THE RANGE EQUIVALENT TO ABOUT 500-4000 CPS. AS DETERMINED AT 120* F. AND 50% SOLIDS, SAID ADDITION OF ALKALI BEING CARRIED OUT WHILE MAINTAINING THE TEMPERATURE OF THE MASS BELOW THE GELATINIZING TEMPERATURE.
Claim 2
Dependent Claim
141 words
A WATER-ACTIVATIBLE ADHESIVE SHEET MATERIAL, CHARACTERIZED BY RAPID AND UNIFORM ACTIVATION UPON MOISTENING WITH WATER, COMPRISING A FLEXIBLE BACKING AND A THIN, NORMALLY NON-TACKY DRIED SURFACE COATING OF AN ADHESIVE COMPOSITION COMPRISING AN ALKALINE-REACTING STARCH BASE ADHESIVE FORMED BY HOLDING A SLURRY OF STARCH IN AN AQUEOUS SOLUTION OF AN OXIDIZING AGENT BELOW THE TEMPERATURE REQUIRED TO GELATINIZE THE STARCH, TO BRING THE STARCH MIXTURE IN AN ACIDIC CONDITION TO A POINT AT WHICH IT IS ALKALI-CONVERTIBLE TO AN ADHESIVE MASS HAVING A VISCOSITY AS HEREIN SPECIFIED, AND THEREUPON ADDING ALKALI TO CONVERT THE SAID ACIDIC STARCH MIXTURE TO A SMOOTH, HOMOGENEOUS, ALKALINE SOLUTION HAVING A VISCOSITY WITHIN THE RANGE EQUIVALENT TO ABOUT 500-4000 CPS. AS DETERMINED AT 120* F. AND 50% SOLIDS, SAID ADDITION OF ALKALI BEING CARRIED OUT WHILE MAINTAINING THE TEMPERATURE OF THE MASS BELOW THE GELATINIZING TEMPERATURE.
References Cited (Backward Citations)
DE167275C
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GB189817650A
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US1020656A
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GB188992A
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US1904619A
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US2188329A
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US2355463A
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US2435701A
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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) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |