US2668110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fiber liberation in cotton stalks and the pulp
Assignee: Spencer Chemical Co
•
Filing: 1948-06-18
•
Granted: 1954-02-02
•
Expires: 1968-06-18
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Spencer
- 👤 Jacobson Abner
- 👤 Sixt Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:20
CPC Classifications
D; D21; D21C; D21C3/00; D21C3/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
METHOD OF LIBERATING THE FIBER OF COTTON STALK IN ITS NATURAL UNDEGRADED LONG FIBER FORM COMPRISING SUSPENDING CHOPPED COTTON STALK IN A FLUID SLURRY CONSISTING OF WATER CONTAINING AS THE ACTIVE DIGESTIVE COMPONENT 0.1 TO 5.0 PER CENT OF A WETTING AGENT, CONTINUOUSLY HEATING THE FIBER BUNDLES IN SAID AQUEOUS SOLUTION TO A TEMPERATURE IN THE RANGE OF ABOUT 250 TO 350* F. UNDER SUBSTANTIALLY THE PRESSURE DEVELOPED AT SAID TEMPERATURE FOR A PERIOD OF ABOUT 5 TO 15 MINTUES, AND THEN NON-ABRASIVELY BEATING THE FIBER UNDER THE SAME HEAT AND PRESSURE TO GENTLY SEPARATE THE DIGESTIVELY SOFTENED BUNDLES INTO SUBSTANTIALLY INDIVIDUAL FIBERS.
Claim 2
Dependent Claim
103 words
METHOD OF LIBERATING THE FIBER OF COTTON STALK IN ITS NATURAL UNDEGRADED LONG FIBER FORM COMPRISING SUSPENDING CHOPPED COTTON STALK IN A FLUID SLURRY CONSISTING OF WATER CONTAINING AS THE ACTIVE DIGESTIVE COMPONENT 0.1 TO 5.0 PER CENT OF A WETTING AGENT, CONTINUOUSLY HEATING THE FIBER BUNDLES IN SAID AQUEOUS SOLUTION TO A TEMPERATURE IN THE RANGE OF ABOUT 250 TO 350* F. UNDER SUBSTANTIALLY THE PRESSURE DEVELOPED AT SAID TEMPERATURE FOR A PERIOD OF ABOUT 5 TO 15 MINTUES, AND THEN NON-ABRASIVELY BEATING THE FIBER UNDER THE SAME HEAT AND PRESSURE TO GENTLY SEPARATE THE DIGESTIVELY SOFTENED BUNDLES INTO SUBSTANTIALLY INDIVIDUAL FIBERS.
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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) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |