Patent US2970882A successfully refreshed from Google Patents.
US2970882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuous purification of bulk fiber
Assignee: Kendall Co
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Filing: 1958-12-03
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Granted: 1961-02-07
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Expires: 1978-12-03
Abstract
No abstract record available.
Inventors
- 👤 Victor M Kumin
- 👤 John H Hollister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:45
CPC Classifications
D; D01; D01C; D01C1/00; D01C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE METHOD OF CONTINUOUSLY PURIFYING BULK UNBLEACHED COTTON FIBERS INCLUDING THE STEPS OF FORMING AN UNCOMPACTED LAYER OF SAID FIBERS, SUPPORTING SAID LAYER ON A CONTINUOUSLY MOVING CONVEYOR BELT, SATURATING SAID LAYER WITH A 1-8% AQUEOUS SOLUTION OF SODIUM HYDROXIDE BETWEEN ABOUT 150*F. AND 212*F., COMPRESSING SAID LAYER WHILE ON SAID CONVEYOR BELT TO DISTRIBUTE SAID SOLUTION UNIFORMLY THROUGHOUT SAID LAYER, AGAIN SATURATING SAID LAYER WITH SAID AQUEOUS SOLUTION, COMPRESSING SAID LAYER TO REDUCE THE AMOUNT OF SOLUTION ON THE FIBER TO A WEIGHT RATIO OF ABOUT 1.25 TO 1.0, REMOVING SAID FIBERS FROM SAID CONVEYOR BELT AND ALLOWING SAID SOLUTION TO REACT WITH SAID LAYER FOR ABOUT 60 MINUTES AT 212*F. IN THE PRESENCE OF STREAM AND IN THE ABSENCE OF AIR, THEREAFTER AGAIN FORMING SAID FIBERS INTO AN UNCOMPACTED LAYER AND SUPPORTING THEM ON A SECOND CONTINUOUSLY MOVING CON-
Claim 2
Independent Claim
141 words
THE METHOD OF CONTINUOUSLY PURIFYING BULK UNBLEACHED COTTON FIBERS INCLUDING THE STEPS OF FORMING AN UNCOMPACTED LAYER OF SAID FIBERS, SUPPORTING SAID LAYER ON A CONTINUOUSLY MOVING CONVEYOR BELT, SATURATING SAID LAYER WITH A 1-8% AQUEOUS SOLUTION OF SODIUM HYDROXIDE BETWEEN ABOUT 150*F. AND 212*F., COMPRESSING SAID LAYER WHILE ON SAID CONVEYOR BELT TO DISTRIBUTE SAID SOLUTION UNIFORMLY THROUGHOUT SAID LAYER, AGAIN SATURATING SAID LAYER WITH SAID AQUEOUS SOLUTION, COMPRESSING SAID LAYER TO REDUCE THE AMOUNT OF SOLUTION ON THE FIBER TO A WEIGHT RATIO OF ABOUT 1.25 TO 1.0, REMOVING SAID FIBERS FROM SAID CONVEYOR BELT AND ALLOWING SAID SOLUTION TO REACT WITH SAID LAYER FOR ABOUT 60 MINUTES AT 212*F. IN THE PRESENCE OF STREAM AND IN THE ABSENCE OF AIR, THEREAFTER AGAIN FORMING SAID FIBERS INTO AN UNCOMPACTED LAYER AND SUPPORTING THEM ON A SECOND CONTINUOUSLY MOVING CON-
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) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |