Patent US3070486A successfully refreshed from Google Patents.
US3070486A
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Cigarette paper products comprising water insoluble dextran
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1958-12-15
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Granted: 1962-12-25
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Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:48
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF MAKING A FIBROUS CONBUSTIBLE CIGARETTE PAPER WHICH CONSISTS IN PREPARING AN AQUEOUS PULP SUSPENSION OF CELLULOSE FIBERS, ADDING THERETO AN AQUEOUS ALKALINE SOLUTION OF WATER-INSOLUBLE DEXTRAN WHICH HAS BEEN IRRADIATED WITH 2900 ANGSTROM ULTRAVIOLET RAYS FOR APPROXIMATELY 30 MINUTES, THE SOLUTION CONTAINING 4%-6% ALKALI, THE DILUTION OF THE DEXTRAN SOLUTION BY THE WATER OF THE PULP SUSPENSION CAUSING THE DEXTRAN TO PRECIPITATE ONTO THE SURFACE OF THE CELLULOSE FIBERS SO AS TO BE ADSORBED THERETO, SAID DEXTRAN HAVING A MOLECULAR WEIGHT BETWEN 1X106 AND 5X106, SHAPING THE RESULTANT SUSPENSION WITH REMOVAL OF WATER TO OBTAIN A SHEET OF FIBERS BONDED BY THE DEXTRAN, AND DRYING THE SHAPED SHEET TO PROVIDE A CIGARETTE PAPER CONTAINING 10% TO 30% BY WEIGHT OF DEXTRAN.
Claim 2
Independent Claim
124 words
A METHOD OF MAKING A FIBROUS CONBUSTIBLE CIGARETTE PAPER WHICH CONSISTS IN PREPARING AN AQUEOUS PULP SUSPENSION OF CELLULOSE FIBERS, ADDING THERETO AN AQUEOUS ALKALINE SOLUTION OF WATER-INSOLUBLE DEXTRAN WHICH HAS BEEN IRRADIATED WITH 2900 ANGSTROM ULTRAVIOLET RAYS FOR APPROXIMATELY 30 MINUTES, THE SOLUTION CONTAINING 4%-6% ALKALI, THE DILUTION OF THE DEXTRAN SOLUTION BY THE WATER OF THE PULP SUSPENSION CAUSING THE DEXTRAN TO PRECIPITATE ONTO THE SURFACE OF THE CELLULOSE FIBERS SO AS TO BE ADSORBED THERETO, SAID DEXTRAN HAVING A MOLECULAR WEIGHT BETWEN 1X106 AND 5X106, SHAPING THE RESULTANT SUSPENSION WITH REMOVAL OF WATER TO OBTAIN A SHEET OF FIBERS BONDED BY THE DEXTRAN, AND DRYING THE SHAPED SHEET TO PROVIDE A CIGARETTE PAPER CONTAINING 10% TO 30% BY WEIGHT OF DEXTRAN.
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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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |