US2702228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of modifying cellulose fibers with alkali solutions of copper or nickel biuret
Assignee: HATHAWAY MANUFACTURING Co
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Filing: 1951-11-19
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Granted: 1955-02-15
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Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 Kahler William Harlow
- 👤 Leslie L Balassa
- 👤 Herbert F Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:53
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06M11/56; D06M11/32; D06M11/36; D06M11/38; D06M11/40; D06M13/00; D06M13/322; D06M13/402; D06M13/432
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A METHOD OF TREATING A FABRIC CONSISTING AT LEAST PREDOMINANTLY OF CELLULOSE FIBERS TO DIMINISH FUZZ, TO INCREASE DIMENSIONAL STABILITY AND TO INCREASE LUSTER AND STIFFNESS, SAID METHOD COMPRISING CONTACTING SAID FABRIC AT A TEMPERATURE BELOW ABOUT 50* C. WITH AN AQUEOUS SOLUTION OF ALKALI METAL HYDROXIDE OF ABOUT 1 TO 6 MOLAR CONCENTRATION CONTAINING DISSOLVED THEREIN THE COPPER-BIURET PRODUCT OF REACTION IN SAID SOLUTION BETWEEN BIURET AND COPPER COMPOUND; THE AMOUNT OF BIURET REACTING IN SAID SOLUTION WITH SAID COPPER COMPOUND BEING IN THE RANGE FROM ABOUT 0.5 TO 80 GRAMS PER LITER AND THE AMOUNT OF COPPER SUPPLIED BY SAID COPPER COMPOUND AND REACTING IN SAID SOLUTION WITH SAID BIURET BEING IN THE RANGE FROM ABOUT .0025 TO ABOUT .25 MOL PER LITER OF COPPER, UNTIL SAID CELLULOSE FIBERS HAVE BEEN SUBSTANTIALLY SWOLLEN AND GELATUNAGED AND THEREAFTER AND XXXX TO SUBSTANTIAL DISINTERSECTION OF SAID CELLULOSE FIBERS REMOVING THE FABRIC FROM CONTACT WITH SOLUTION WHILE THE FABRIC IS MAINTAINED UNDER SUBSTANTIAL TENSION, SEPARATING RETAINED CHEMICALS THEREFROM AND DRYING THE FABRIC.
Claim 2
Independent Claim
171 words
A METHOD OF TREATING A FABRIC CONSISTING AT LEAST PREDOMINANTLY OF CELLULOSE FIBERS TO DIMINISH FUZZ, TO INCREASE DIMENSIONAL STABILITY AND TO INCREASE LUSTER AND STIFFNESS, SAID METHOD COMPRISING CONTACTING SAID FABRIC AT A TEMPERATURE BELOW ABOUT 50* C. WITH AN AQUEOUS SOLUTION OF ALKALI METAL HYDROXIDE OF ABOUT 1 TO 6 MOLAR CONCENTRATION CONTAINING DISSOLVED THEREIN THE COPPER-BIURET PRODUCT OF REACTION IN SAID SOLUTION BETWEEN BIURET AND COPPER COMPOUND; THE AMOUNT OF BIURET REACTING IN SAID SOLUTION WITH SAID COPPER COMPOUND BEING IN THE RANGE FROM ABOUT 0.5 TO 80 GRAMS PER LITER AND THE AMOUNT OF COPPER SUPPLIED BY SAID COPPER COMPOUND AND REACTING IN SAID SOLUTION WITH SAID BIURET BEING IN THE RANGE FROM ABOUT .0025 TO ABOUT .25 MOL PER LITER OF COPPER, UNTIL SAID CELLULOSE FIBERS HAVE BEEN SUBSTANTIALLY SWOLLEN AND GELATUNAGED AND THEREAFTER AND XXXX TO SUBSTANTIAL DISINTERSECTION OF SAID CELLULOSE FIBERS REMOVING THE FABRIC FROM CONTACT WITH SOLUTION WHILE THE FABRIC IS MAINTAINED UNDER SUBSTANTIAL TENSION, SEPARATING RETAINED CHEMICALS THEREFROM AND DRYING THE FABRIC.
References Cited (Backward Citations)
US1661879A
Cited
GB598556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |