Patent US2759853A successfully refreshed from Google Patents.
US2759853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making coated paper
Assignee: Hercules Powder Co
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Filing: 1951-08-03
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Granted: 1956-08-21
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Expires: 1971-08-03
Abstract
No abstract record available.
Inventors
- 👤 John W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:39
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE PROCESS FOR PREPARING A COATED PAPER COMPRISING APPLYING TO THE SURFACE OF A WEB OF CELLULOSIC FIBERS A COATING CONSISTING ESSENTAILLY OF 100 PARTS OF PIGMENT DISPERSED IN A SOLUTION, IN AQUEOUS SODIUM HYDROXIDE, OF FROM 5 TO 15 PARTS OF BINDER CONSISTING ESSENTIALLY OF A WATER-INSOLUBLER SALT OF A CELLULOSE ALKYL SULFONIC ACID ETHER, SAID COATING CONTAINING AT LEAST ABOUT 40% SOLIDS AND IMMEDIATELY AFTER APPLICATION OF SAID COATING PRECIPITATING SAID SALT OF A CELLULOSE ALKYL SULFONIC ACID ETHER FROM SOLUTION BY IMMEDIATELY CONTACTING SAID COATING WITH A WATER SOLUTION OF AN ACIDIC GELATION AGENT FOR A WATERINSOLUBLE SALT OF A CELLULOSE ALKYL SULFONIC ACID ETHER, AND THEN DRYING THE PAPER.
Claim 2
Dependent Claim
113 words
THE PROCESS FOR PREPARING A COATED PAPER COMPRISING APPLYING TO THE SURFACE OF A WEB OF CELLULOSIC FIBERS A COATING CONSISTING ESSENTAILLY OF 100 PARTS OF PIGMENT DISPERSED IN A SOLUTION, IN AQUEOUS SODIUM HYDROXIDE, OF FROM 5 TO 15 PARTS OF BINDER CONSISTING ESSENTIALLY OF A WATER-INSOLUBLER SALT OF A CELLULOSE ALKYL SULFONIC ACID ETHER, SAID COATING CONTAINING AT LEAST ABOUT 40% SOLIDS AND IMMEDIATELY AFTER APPLICATION OF SAID COATING PRECIPITATING SAID SALT OF A CELLULOSE ALKYL SULFONIC ACID ETHER FROM SOLUTION BY IMMEDIATELY CONTACTING SAID COATING WITH A WATER SOLUTION OF AN ACIDIC GELATION AGENT FOR A WATERINSOLUBLE SALT OF A CELLULOSE ALKYL SULFONIC ACID ETHER, AND THEN DRYING THE PAPER.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |