US2555057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of paper coating adhesives
Assignee: Warren SD Co
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Filing: 1947-12-10
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Granted: 1951-05-29
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Expires: 1967-12-10
Abstract
No abstract record available.
Inventors
- 👤 Laurence W Porter
- 👤 Frank H Jewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:35
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/54; D21H19/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
PROCESS FOR THE PRODUCTION OF A PAPER COATING COMPOSITION WHICH COMPRISES HEATING A MIXTURE OF AN AMYLACEOUS MATERIAL AND A WATERSOLUBLE, ACID-CURING AMINORESIN FORMED BY REACTING AN ALDEHYDE WITH A COMPOUND CONTAINING MORE THAN ONE AMINO GROUP, IN AN AQUEOUS MEDIUM MAINTAINED AT A PH VALUE OF FROM 7 TO 8 AT AN ELEVATED TEMPERATURE UNTIL THE MIXTURE ATTAINS SUBSTANTIALLY ITS MINIMUM VISCOSITY AND QUICKLY CHECKING THE REACTION AT THIS POINT BY VIGOROUSLY AGITATING THE MIXTURE WITH THE ADDTION OF WATER AND FINELY DIVIDED CALCIUM CARBONATE PIGMENT.
Claim 2
Dependent Claim
87 words
PROCESS FOR THE PRODUCTION OF A PAPER COATING COMPOSITION WHICH COMPRISES HEATING A MIXTURE OF AN AMYLACEOUS MATERIAL AND A WATERSOLUBLE, ACID-CURING AMINORESIN FORMED BY REACTING AN ALDEHYDE WITH A COMPOUND CONTAINING MORE THAN ONE AMINO GROUP, IN AN AQUEOUS MEDIUM MAINTAINED AT A PH VALUE OF FROM 7 TO 8 AT AN ELEVATED TEMPERATURE UNTIL THE MIXTURE ATTAINS SUBSTANTIALLY ITS MINIMUM VISCOSITY AND QUICKLY CHECKING THE REACTION AT THIS POINT BY VIGOROUSLY AGITATING THE MIXTURE WITH THE ADDTION OF WATER AND FINELY DIVIDED CALCIUM CARBONATE PIGMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |