US2640790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated paper and process for making same
Assignee: Hercules Powder Co
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Filing: 1949-10-26
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Granted: 1953-06-02
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Expires: 1969-10-26
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Barber
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; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE PROCESS FOR PREPARING A COATED PAPER OF THE TYPE HAVING A BASE OF CELLULOSIC FIBERS AND A PRINTING SURFACE CONSISTING ESSENTIALLY OF A FILM OF CONTIGUOUS PIGMENT PARTICLES INTERSPERSED IN BINDER BY MEANS OF WHICH THE PIGMENT PARTICLES ARE BOUND TOGETHER AND ARE RETAINED ON THE BASE COMPRISING DISPERSING A PIGMENT IN AN AQUEOUS SOLUTION OF A BINDER CONSISTING ESSENTIALLY OF A WATER-SOLUBLE METAL SALT OF A CELLULOSE ETHYL ETHER B-SULFONIC ACID TO FORM A VISCOUS COATING COLOR HAVING FROM ABOUT 30% TO ABOUT 65% TOTAL SOLIDS AND HAVING SAID BINDER PRESENT IN THE AMOUNT OF BETWEEN ABOUT 5% AND ABOUT 15%, BASED ON THE WEIGHT OF THE PIGMENT, COVERING A WEB OF SAID PAPER WITH A COATING OF SAID VISCOUS COATING COLOR, AND DRYING THE PAPER TO FORM A COATED PAPER HAVING EXCELLENT RECEPTIVITY TO PRINTING.
Claim 2
Dependent Claim
138 words
THE PROCESS FOR PREPARING A COATED PAPER OF THE TYPE HAVING A BASE OF CELLULOSIC FIBERS AND A PRINTING SURFACE CONSISTING ESSENTIALLY OF A FILM OF CONTIGUOUS PIGMENT PARTICLES INTERSPERSED IN BINDER BY MEANS OF WHICH THE PIGMENT PARTICLES ARE BOUND TOGETHER AND ARE RETAINED ON THE BASE COMPRISING DISPERSING A PIGMENT IN AN AQUEOUS SOLUTION OF A BINDER CONSISTING ESSENTIALLY OF A WATER-SOLUBLE METAL SALT OF A CELLULOSE ETHYL ETHER B-SULFONIC ACID TO FORM A VISCOUS COATING COLOR HAVING FROM ABOUT 30% TO ABOUT 65% TOTAL SOLIDS AND HAVING SAID BINDER PRESENT IN THE AMOUNT OF BETWEEN ABOUT 5% AND ABOUT 15%, BASED ON THE WEIGHT OF THE PIGMENT, COVERING A WEB OF SAID PAPER WITH A COATING OF SAID VISCOUS COATING COLOR, AND DRYING THE PAPER TO FORM A COATED PAPER HAVING EXCELLENT RECEPTIVITY TO PRINTING.
References Cited (Backward Citations)
FR480679A
Cited
US1682293A
Cited
US2373933A
Cited
US2441927A
Cited
US2425769A
Cited
US2422000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |