US2776911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coating paper with gellable water soluble salt of cellulose sulfate and pigment and gelling said coating
Assignee: Hercules Powder Co
•
Filing: 1952-04-30
•
Granted: 1957-01-08
•
Expires: 1972-04-30
Abstract
No abstract record available.
Inventors
- 👤 George P Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:52
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/52; D21H25/00; D21H25/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
THE PROCESS FOR PREPARING A COATED PAPER COMPRISING APPLYING TO THE SURFACE OF A WEB OF CELLULOSE FIBERS A COATING COLOR COMPRISING ESSENTIALLY A PIGMENT DISPERSED IN AN AQUEOUS SOLUTION OF ADHESIVE, SAID COATING COLOR HAVING FROM ABOUT 30% TO ABOUT 65% TOTAL SOLIDS AND HAVING SAID ADHESIVE PRESENT IN THE AMOUNT OF BETWEEN ABOUT 5% AND ABOUT 15% BASED ON THE WEIGHT OF THE PIGMENT, AND ADHESIVE CONSISTING OF A WATER-SOLUBLE SALT OF CELLULOSE SULFATE HAVING FROM ABOUT 0.2 TO ABOUT 1.5 SULFATE GROUPS PER ANHYDROGLUCOSE UNIT AND SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL, AMMONIUM AND CALCIUM SALTS, AND AFTER APPLICATION OF SAID COATING COLOR COAGULATING SAID CELLULOSE SULFATE SALT BY CONTACTING THE RESULTING COATING WITH A WATER SOLUTION OF MAGNESIUM CHLORIDE, AND DRYING THE PAPER.
Claim 2
Dependent Claim
130 words
THE PROCESS FOR PREPARING A COATED PAPER COMPRISING APPLYING TO THE SURFACE OF A WEB OF CELLULOSE FIBERS A COATING COLOR COMPRISING ESSENTIALLY A PIGMENT DISPERSED IN AN AQUEOUS SOLUTION OF ADHESIVE, SAID COATING COLOR HAVING FROM ABOUT 30% TO ABOUT 65% TOTAL SOLIDS AND HAVING SAID ADHESIVE PRESENT IN THE AMOUNT OF BETWEEN ABOUT 5% AND ABOUT 15% BASED ON THE WEIGHT OF THE PIGMENT, AND ADHESIVE CONSISTING OF A WATER-SOLUBLE SALT OF CELLULOSE SULFATE HAVING FROM ABOUT 0.2 TO ABOUT 1.5 SULFATE GROUPS PER ANHYDROGLUCOSE UNIT AND SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL, AMMONIUM AND CALCIUM SALTS, AND AFTER APPLICATION OF SAID COATING COLOR COAGULATING SAID CELLULOSE SULFATE SALT BY CONTACTING THE RESULTING COATING WITH A WATER SOLUTION OF MAGNESIUM CHLORIDE, AND DRYING THE PAPER.
References Cited (Backward Citations)
US2106709A
Cited
FR856012A
Cited
US2559914A
Cited
US2395992A
Cited
US2655864A
Cited
US2502783A
Cited
US2640790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |