US3049467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of paper
Assignee: OI Glass Inc
•
Filing: 1959-07-27
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Granted: 1962-08-14
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Expires: 1979-07-27
Abstract
No abstract record available.
Inventors
- 👤 Cecil B Curry
- 👤 James W Haley
- 👤 Joseph C Theiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:03
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A METHOD OF PROCESSING PULP FORMED FROM WOOD, SAID PULP CHARACTERIZED BY A CONTENT OF UNDESIRABLE IMPURITIES IN THE FORM OF WOOD-BARK PARTICLES, SHIVES, KNOTS, AND THE LIKE, WHICH COMPRISES WASHING SAID PULP, DILUTING SAID PULP STOCK WITH WATER TO A CONSISTENCY RANGING FROM ABOUT 0.8 TO 1.8% PULP, INTRODUCING SAID DILUTED STOCK INTO A ZONE OF VORTICAL FLOW, THEREBY EFFECTING VORTICAL HYDRAULIC SEPARATION OF A FRACTION LOW IN IMPURITIES CONTENT FROM A FRACTION HIGHER IN IMPURITIES CONTENT DUE TO THE COMBINED EFFECTS OF GRAVITATIONAL, ROTATIONAL AND HYDRAULIC FORCES, INTRODUCING SAID FRACTION OF HIGHER IMPURITY CONTENT INTO A SECOND ZONE OF VORTICAL FLOW, THEREBY FORMING A SECOND SET OF FRACTIONS OF HIGH AND LOW IMPURITY CONTENT, RETURING SAID LAST-MENTIONED FRACTION TO SAID FIRST ZONE, DIRECTION SAID OTHER HIGH IMPURITY FRACTION TO A THIRD ZONE OF VORTICAL FLOW, THEREBY EFFECTING A THIRD PAIR OF FRACTIONS OF HIGH AND LOW IMPURITY CONTENT, RETURNING THE LAST-
Claim 2
Independent Claim
153 words
A METHOD OF PROCESSING PULP FORMED FROM WOOD, SAID PULP CHARACTERIZED BY A CONTENT OF UNDESIRABLE IMPURITIES IN THE FORM OF WOOD-BARK PARTICLES, SHIVES, KNOTS, AND THE LIKE, WHICH COMPRISES WASHING SAID PULP, DILUTING SAID PULP STOCK WITH WATER TO A CONSISTENCY RANGING FROM ABOUT 0.8 TO 1.8% PULP, INTRODUCING SAID DILUTED STOCK INTO A ZONE OF VORTICAL FLOW, THEREBY EFFECTING VORTICAL HYDRAULIC SEPARATION OF A FRACTION LOW IN IMPURITIES CONTENT FROM A FRACTION HIGHER IN IMPURITIES CONTENT DUE TO THE COMBINED EFFECTS OF GRAVITATIONAL, ROTATIONAL AND HYDRAULIC FORCES, INTRODUCING SAID FRACTION OF HIGHER IMPURITY CONTENT INTO A SECOND ZONE OF VORTICAL FLOW, THEREBY FORMING A SECOND SET OF FRACTIONS OF HIGH AND LOW IMPURITY CONTENT, RETURING SAID LAST-MENTIONED FRACTION TO SAID FIRST ZONE, DIRECTION SAID OTHER HIGH IMPURITY FRACTION TO A THIRD ZONE OF VORTICAL FLOW, THEREBY EFFECTING A THIRD PAIR OF FRACTIONS OF HIGH AND LOW IMPURITY CONTENT, RETURNING THE LAST-
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) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |