US3406006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the treatment of fabrics containing cellulose fibres with liquid ammonia
Assignee: Sentralinstitutt for Industriell Forskning
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Filing: 1965-04-23
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Granted: 1968-10-15
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Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 Lindberg Karl Joel
- 👤 Stranger-Johannessen Per
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:22
CPC Classifications
D; D06; D06B; D06B7/00; D06B7/08; D06M; D06M11/00; D06M11/58; D06M11/59; D06M11/61; D06M2101/00; D06M2101/02; D06M2101/04; D06M2101/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
IN A METHOD OF TREATING WOVEN OR KNITTED FABRIC CONTAINING NATURAL OR REGENERATED CELLULOSIC FIBERS, THE IMPROVEMENT INCLUDING TE STEPS OF (A) IMPREGNATING SAID FABRIC WITH LIQUID AMMONIA RANGING, WITH RESPECT TO WATER CONTENT, FROM ANHYDROUS LIQUID AMMONIA TO LIQUID AMMONIA CONTAINING UP TO 10% BY WEIGHT OF WATER, BY APPLYING SAID LIQUID AMMONIA TO THE FABRIC IN AN IMPREGNATING ZONE, (B) REMOVING THE SATURATED IMPREGNATED FABRIC TO AN ATMOSPHERE HAVING AN AMMONIA VAPOR PRESSURE SUFFICIENT TO RETAIN SAID LIQUID AMMONIA IN THE FABRIC UNTIL ENSUING SWELLING OF THE FABRIC HAS TAKEN PLACE, (C) REMOVING THE AMMONIA FROM THE SWOLLEN FABRIC, AND (D) APPLYING TENSION TO SAID FABRIC DURING AT LEAST ONE OF STEPS (B) AND (C), THE TENSION BEING SUFFICIENT TO PREVENT THE FORMATION OF MUSSINESS IN SAID FABRIC BUT BEING LESS THAN THE TENSION WHICH CAUSES A SUBSTANTIAL WASHING SHRINKAGE AND BEING MINIMUM IN THE DIRECTION IN WHICH MAXIMUM EXTENSIBILITY IS DESIRED AND MAXIMUM IN THE DIRECTION PERPENDICULAR THERETO, AND BEING MINIMUM IN BOTH DIRECTIONS WHEN MAXIMUM EXTENSIBILITY IN BOTH DIRECTIONS IS DESIRED.
Claim 2
Dependent Claim
175 words
IN A METHOD OF TREATING WOVEN OR KNITTED FABRIC CONTAINING NATURAL OR REGENERATED CELLULOSIC FIBERS, THE IMPROVEMENT INCLUDING TE STEPS OF (A) IMPREGNATING SAID FABRIC WITH LIQUID AMMONIA RANGING, WITH RESPECT TO WATER CONTENT, FROM ANHYDROUS LIQUID AMMONIA TO LIQUID AMMONIA CONTAINING UP TO 10% BY WEIGHT OF WATER, BY APPLYING SAID LIQUID AMMONIA TO THE FABRIC IN AN IMPREGNATING ZONE, (B) REMOVING THE SATURATED IMPREGNATED FABRIC TO AN ATMOSPHERE HAVING AN AMMONIA VAPOR PRESSURE SUFFICIENT TO RETAIN SAID LIQUID AMMONIA IN THE FABRIC UNTIL ENSUING SWELLING OF THE FABRIC HAS TAKEN PLACE, (C) REMOVING THE AMMONIA FROM THE SWOLLEN FABRIC, AND (D) APPLYING TENSION TO SAID FABRIC DURING AT LEAST ONE OF STEPS (B) AND (C), THE TENSION BEING SUFFICIENT TO PREVENT THE FORMATION OF MUSSINESS IN SAID FABRIC BUT BEING LESS THAN THE TENSION WHICH CAUSES A SUBSTANTIAL WASHING SHRINKAGE AND BEING MINIMUM IN THE DIRECTION IN WHICH MAXIMUM EXTENSIBILITY IS DESIRED AND MAXIMUM IN THE DIRECTION PERPENDICULAR THERETO, AND BEING MINIMUM IN BOTH DIRECTIONS WHEN MAXIMUM EXTENSIBILITY IN BOTH DIRECTIONS IS DESIRED.
References Cited (Backward Citations)
FR726293A
Cited
US1998551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |