US3013932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing paper and process of making the same
Assignee: Fort James Corp
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Filing: 1958-01-14
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Granted: 1961-12-19
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Expires: 1978-01-14
Abstract
No abstract record available.
Inventors
- 👤 Delmer D Hinrichs
- 👤 Fred L Schmidt
- 👤 James D Wethern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:54
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE PROCESS OF MAKING PAPERMAKING PULP WHICH COMPRISES FORMING A MIXTURE OF BAGASSE AND AN AQUEOUS LIQUOR CONTAINING FROM 0.1 TO 25% BY WEIGHT OF SODIUM HYDROXIDE AND HAVING A PH OF AT LEAST 12, SAID MIXTURE HAVING A LIQUOR-BAGASSE BY MAINTAINING THE 2:1 TO 100:1 SOFTENING THE BAGASSE BY MAINTAINING THE MIXTURE AT A TEMPERATURE OF BETWEEN 50*F. AND 250*F. UNTIL THE BAGASSE HAS CONSUMED FROM 1 TO 7% OF ITS OVENDRY WEIGHT OF THE HYDROXIDE WHILE RETAINING SUBSTANTIALLY ALL OF ITS ORIGINAL LIGNIN CONTENT, AND MECHANICALLY DEFIBERING THE SOFTENED BAGASSE TO FORM A MECHANICAL-TYPE PAPERMAKING PULP OF HIGH LIGNIN CONTENT AND GOOD PRINTING QUALITIES.
Claim 2
Dependent Claim
106 words
THE PROCESS OF MAKING PAPERMAKING PULP WHICH COMPRISES FORMING A MIXTURE OF BAGASSE AND AN AQUEOUS LIQUOR CONTAINING FROM 0.1 TO 25% BY WEIGHT OF SODIUM HYDROXIDE AND HAVING A PH OF AT LEAST 12, SAID MIXTURE HAVING A LIQUOR-BAGASSE BY MAINTAINING THE 2:1 TO 100:1 SOFTENING THE BAGASSE BY MAINTAINING THE MIXTURE AT A TEMPERATURE OF BETWEEN 50*F. AND 250*F. UNTIL THE BAGASSE HAS CONSUMED FROM 1 TO 7% OF ITS OVENDRY WEIGHT OF THE HYDROXIDE WHILE RETAINING SUBSTANTIALLY ALL OF ITS ORIGINAL LIGNIN CONTENT, AND MECHANICALLY DEFIBERING THE SOFTENED BAGASSE TO FORM A MECHANICAL-TYPE PAPERMAKING PULP OF HIGH LIGNIN CONTENT AND GOOD PRINTING QUALITIES.
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) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |