US3093534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Papermaking process and product
Assignee: Akzo Nobel UK PLC
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Filing: 1960-01-07
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Granted: 1963-06-11
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Expires: 1980-01-07
Abstract
No abstract record available.
Inventors
- 👤 James H Filling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:57
CPC Classifications
D; D21; D21F; D21F11/00; D21F11/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD FOR MAAKING PAPER WHICH COMPRISES FORMING AN AQUEOUS PAPER-MAKING SLURRY HAVING A FIBROUS COMPONENT COMPRISING BETWEEN ABOUT 10% AND ABOUT 75% BY WEIGHT REGENERATED CELLULOSE FIBER AND BETWEEN ABOUT 90% AND ABOUT 25% BY WEIGHT NATURAL CELLULOSE FIBER, SAID SLURRY ALSO CONTAINING BETWEEN ABOUT 0.01 AND ABOUT 1% BY WEIGHT OF A POLYACRYLIC ACID HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 200,000 AND ABOUT 860,000, AND FORMING SAID SLURRY INTO PAPER.
Claim 2
Independent Claim
72 words
A METHOD FOR MAAKING PAPER WHICH COMPRISES FORMING AN AQUEOUS PAPER-MAKING SLURRY HAVING A FIBROUS COMPONENT COMPRISING BETWEEN ABOUT 10% AND ABOUT 75% BY WEIGHT REGENERATED CELLULOSE FIBER AND BETWEEN ABOUT 90% AND ABOUT 25% BY WEIGHT NATURAL CELLULOSE FIBER, SAID SLURRY ALSO CONTAINING BETWEEN ABOUT 0.01 AND ABOUT 1% BY WEIGHT OF A POLYACRYLIC ACID HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 200,000 AND ABOUT 860,000, AND FORMING SAID SLURRY INTO PAPER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |