US3070487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous webs, including paper, formed from water insoluble dextran fibers
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1959-02-20
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Granted: 1962-12-25
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Expires: 1979-02-20
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:27
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/10; D21H13/28; D21H13/30; D21H5/00; D21H5/12; D21H5/1227
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A METHOD OF MAKING FIBROUS PAPER WEB USEFUL AS A CIGARETTE PAPER WRAPPER WHICH CONSISTS IN PREPARING AN AQUEOUS ACID-CONTAINING SUSPENSION OF DISCONTINUOUS WATER-INSOLUTION DEXTRAN FIBERS, DISTRIBUTING AN AQUEOUS ALKALINE SOLUTION OF WATER-INSOLUBLEDEXTRAN, INTORDUCING THEREIN AN AQUEOUS ALKALINE SOLUTION RESULTING FROM DILU TION AND NEUTRALIZATION OF AN ACID-CONTAINING WATER SUSPENSION OF WATER-SOLUBLE DEXTRAN WHICH IS PRECIPITATED ON THE FIBER SURFACES AND BONDS THE FIBERS TOGETHER, FORMING THE SUSPENSION INTO A PAPER SHEET, AND DRYING AND FINISHING THE SHEET TO OBTAIN A PAPER SHEET IN WHICH THE FIBERS ARE BONDED TOGETHER BY THE WATER-INSOLUBLE DEXTRAN CARRIED ON THE FIBER SURFACES, SAID PRECIPITATED DEXTRAN PROVIDING A FILLER FOR THE CIGARETTE PAPER.
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) | 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 |