Patent US2994634A successfully refreshed from Google Patents.
US2994634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cellulosic products
Assignee: Kimberly Clark Corp
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Filing: 1958-01-02
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Granted: 1961-08-01
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Expires: 1978-01-02
Abstract
No abstract record available.
Inventors
- 👤 Jack E Jayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:46
CPC Classifications
D; D21; D21H; D21H11/00; D21H11/16; D21H11/20; D06; D06M; D06M13/00; D06M13/322; D06M13/345; D06M13/348; D21H13/00; D21H13/02; D21H13/08; D21H13/10; D21H13/12; D21H13/18; D21H13/20; D21H13/24; D21H13/26; D21H13/36; D21H13/38; D21H13/40; D21H13/44; Y; Y10; Y10S; Y10S8/00; Y10S8/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
THE METHOD OF MAKING A FIBROUS CYANOETHYLATED CELLULOSE SHEET DIELECTRIC MATERIAL WHICH COMPRISES TREATING CELLULOSE FIBERS WITH AN AQUEOUS SOLUTION OF A WATER SOLUBLE STRONGLY BASIC HYDROXIDE HAVING A 5-10 PERCENT HYDROXIDE CONCENTRATION, REACTING SAID CELLULOSE FIBERS CONTAINED IN SAID SOLUTION WITH ACRYLONITRILE IN AN AMOUNT 85-300 PERCENT OF THE WEIGHT OF THE CELLULOSE FIBERS AT A TEMPERATURE OF LESS THAN ABOUT 50*C., TO FORM CYANOETHYLATED CELLULOSE FIBERS HAVING A DEGREE OF SUBSTITUTION OF ABOUT 0.5-1.5 CYANOETHYL GROUPS PER GLUCOSE UNIT OF THE CELLULOSE, SEPARATING THE FIBERS FROM THE SOLUTION, FORMING A LAYER CONSISTING ESSENTIALLY OF THE CYANOETHYLATED PULP HAVING A MOISTURE CONTENT OF AT LEAST ABOUT 10 PERCENT, HEATING SAID LAYER WHILE SUPPORTED TO CONVERT SAID LAYER INTO A HEAT BONDED SELF-SUSTAINING PAPER SHEET, PASSING SAID SHEET HAVING AN INITIAL MOISTURE CONTENT OF AT LEAST 15 PERCENT BETWEEN A RESILIENT ROLL AND A NON-RESILIENT ROLL AT A TEMPERATURE OF FROM ABOUT 275*F. TO 450*F. UNDER A PRESSURE OF AT LEAST ABOUT 10 POUNDS PER LINEAR INCH.
Claim 2
Independent Claim
167 words
THE METHOD OF MAKING A FIBROUS CYANOETHYLATED CELLULOSE SHEET DIELECTRIC MATERIAL WHICH COMPRISES TREATING CELLULOSE FIBERS WITH AN AQUEOUS SOLUTION OF A WATER SOLUBLE STRONGLY BASIC HYDROXIDE HAVING A 5-10 PERCENT HYDROXIDE CONCENTRATION, REACTING SAID CELLULOSE FIBERS CONTAINED IN SAID SOLUTION WITH ACRYLONITRILE IN AN AMOUNT 85-300 PERCENT OF THE WEIGHT OF THE CELLULOSE FIBERS AT A TEMPERATURE OF LESS THAN ABOUT 50*C., TO FORM CYANOETHYLATED CELLULOSE FIBERS HAVING A DEGREE OF SUBSTITUTION OF ABOUT 0.5-1.5 CYANOETHYL GROUPS PER GLUCOSE UNIT OF THE CELLULOSE, SEPARATING THE FIBERS FROM THE SOLUTION, FORMING A LAYER CONSISTING ESSENTIALLY OF THE CYANOETHYLATED PULP HAVING A MOISTURE CONTENT OF AT LEAST ABOUT 10 PERCENT, HEATING SAID LAYER WHILE SUPPORTED TO CONVERT SAID LAYER INTO A HEAT BONDED SELF-SUSTAINING PAPER SHEET, PASSING SAID SHEET HAVING AN INITIAL MOISTURE CONTENT OF AT LEAST 15 PERCENT BETWEEN A RESILIENT ROLL AND A NON-RESILIENT ROLL AT A TEMPERATURE OF FROM ABOUT 275*F. TO 450*F. UNDER A PRESSURE OF AT LEAST ABOUT 10 POUNDS PER LINEAR INCH.
References Cited (Backward Citations)
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |