US3096231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing paper from partially esterified cellulose fibers
Assignee: Eastman Kodak Co
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Filing: 1960-04-18
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Granted: 1963-07-02
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Expires: 1980-04-18
Abstract
No abstract record available.
Inventors
- 👤 William H Griggs
- 👤 Ralph D Zaffrann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:46
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/14; D21H5/141; D21H5/145; D21H5/146; D21H23/00; D21H23/76; D21H23/765; D21H11/00; D21H11/16; D21H11/20; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43; D21H17/46; D21H17/54; D21H17/55; D21H17/63; D21H17/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD OF PREPARING PAPER WHICH COMPRISES FORMING AN AQUEOUS SUSPENSION OF CELLULOSE FIBERS THE CELLULOSE OF WHICH CONTAINS 15-25% OF LOWER FATTY ACID GROUPS CHEMICALLY COMBINED THEREWITH ADDING TO THIS SUSPENSION IN THAT ORDER A WATER SOLUBLE SALT OF A HIGHER FATTY ACID, A WATER SLUBLE ALUMINUM SALT OF A STRONG MINERAL ACID AND A WATER SOLUBLE CATIONIC THERMOSETTING RESIN FORMED BY REACTING EPICHLOROHYDRIN WITH A PLYAMIDE OF C3 TO C10 SATURATED ALIPHATIC DIBASIC CARBOXYLIC ACID AND FROM ABOUT 0.8 TO ABOUT 1.4 MOLES PER MOLE OF DIBASIC ACID OF A POLYALKYLENE POLYAMINE AT A TEMPERATURE FROM ABOUT 45*C. TO ABOUT 100*C., SAID POLYAMIDE CONTAINING SECONDARY AMINE GROUPS, THE RATIO OF EPICHLOROHYDRIN TO SECNDARY AMINE GROUPS OF SAID POLYAMIDE BEING FROM ABOUT 0.5-1 TO ABOUT 1.8-1, ADSORBING 0.1-5% APPROXIMATELY OF SAID RESIN ON SAID CELLULOSE FIBERS, FROMING THE CELLULOSE FIBERS SUSPENSION INTO A SHEET AND HEATING THE SHEET TO CURE THE RESIN TO A WATER INSOLUBLE STATE.
Claim 2
Independent Claim
158 words
A METHOD OF PREPARING PAPER WHICH COMPRISES FORMING AN AQUEOUS SUSPENSION OF CELLULOSE FIBERS THE CELLULOSE OF WHICH CONTAINS 15-25% OF LOWER FATTY ACID GROUPS CHEMICALLY COMBINED THEREWITH ADDING TO THIS SUSPENSION IN THAT ORDER A WATER SOLUBLE SALT OF A HIGHER FATTY ACID, A WATER SLUBLE ALUMINUM SALT OF A STRONG MINERAL ACID AND A WATER SOLUBLE CATIONIC THERMOSETTING RESIN FORMED BY REACTING EPICHLOROHYDRIN WITH A PLYAMIDE OF C3 TO C10 SATURATED ALIPHATIC DIBASIC CARBOXYLIC ACID AND FROM ABOUT 0.8 TO ABOUT 1.4 MOLES PER MOLE OF DIBASIC ACID OF A POLYALKYLENE POLYAMINE AT A TEMPERATURE FROM ABOUT 45*C. TO ABOUT 100*C., SAID POLYAMIDE CONTAINING SECONDARY AMINE GROUPS, THE RATIO OF EPICHLOROHYDRIN TO SECNDARY AMINE GROUPS OF SAID POLYAMIDE BEING FROM ABOUT 0.5-1 TO ABOUT 1.8-1, ADSORBING 0.1-5% APPROXIMATELY OF SAID RESIN ON SAID CELLULOSE FIBERS, FROMING THE CELLULOSE FIBERS SUSPENSION INTO A SHEET AND HEATING THE SHEET TO CURE THE RESIN TO A WATER INSOLUBLE STATE.
References Cited (Backward Citations)
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US2366723A
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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) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |