US3077371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of knitted fabrics
Assignee: Celanese Corp
•
Filing: 1956-02-14
•
Granted: 1963-02-12
•
Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Werner A P Schoeneberg
- 👤 Fortess Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:48
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/20; D06L4/22; D06L4/24; D06L4/10; D06L4/15; D06L4/23
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
PROCESS FOR THE TREATMENT OF FABRICS, WHICH COMPRISES BLEACHING AT A PH WHICH DOES NOT EXCEED ABOUT 9.5 A KNITTED FABRIC COMPRISING FIBERS OF A CELLULOSE LOWER ALIPHATIC ACID ESTER CONTAINING AT MOST 0.29 FREE OH GROUPS PER ANHYDROGLUCOSE UNIT THE REMAINING GROUPS BEING CELLULOSE ESTER GROUPS SUCH THAT MOST OF SAID ANHYDROGLUCOSE UNITS CONTAIN THREE ESTER GROUPS, AND DURING SAID BLEACHING SUBJECTING SAID FABRIC TO AN AQUEOUS LIQUID AT A TEMPERATURE OF AT LEAST 250* F. BUT BELOW THE MELTING POINT OF THE FABRIC OF IMPROVED DIMENSIONAL STABILITY. A CELLULOSE ESTER FABRIC OF IMPROVED DIMENSIONAL STABILITY,
Claim 2
Dependent Claim
97 words
PROCESS FOR THE TREATMENT OF FABRICS, WHICH COMPRISES BLEACHING AT A PH WHICH DOES NOT EXCEED ABOUT 9.5 A KNITTED FABRIC COMPRISING FIBERS OF A CELLULOSE LOWER ALIPHATIC ACID ESTER CONTAINING AT MOST 0.29 FREE OH GROUPS PER ANHYDROGLUCOSE UNIT THE REMAINING GROUPS BEING CELLULOSE ESTER GROUPS SUCH THAT MOST OF SAID ANHYDROGLUCOSE UNITS CONTAIN THREE ESTER GROUPS, AND DURING SAID BLEACHING SUBJECTING SAID FABRIC TO AN AQUEOUS LIQUID AT A TEMPERATURE OF AT LEAST 250* F. BUT BELOW THE MELTING POINT OF THE FABRIC OF IMPROVED DIMENSIONAL STABILITY. A CELLULOSE ESTER FABRIC OF IMPROVED DIMENSIONAL STABILITY,
Claim 3
Dependent Claim
98 words
PROCESS FOR THE TREATMENT OF FABRICS WHICH COMPRISES SUBJECTING A KNITTED FABRIC COMPRISING FIBERS OF A CELLULOSE LOWER ALIPHATIC ACID ESTER TO AN AQUEOUS LIQUID AT A TEMPPERATURE OF AT LEAST 250* F. BUT BELOW THE MELTING POINT OF THE FABRIC AND UNDER SUPERATMOSPHERIC PRESSURE, SAID CELLULOSE ESTER CONTAINING AT MOST 0.29 FREE OH GROUP PER ANHYDROGLUCOSE UNIT, THE REMAINING GROUPS BEING CELLULOSE ESTER GROUPS, SUCH THAT MOST OF SAID ANHYDROGLUCOSE UNITS CONTAIN THREE ESTER GROUPS, AND THEN BLEACHING SAID FABRIC AT A PH NOT EXCEEDING ABOUT 9.5 TO OBTAIN A CELLULOSE ESTER FABRIC OF IMPROVED DIMENSIONAL STABILITY.
Claim 4
Dependent Claim
98 words
PROCESS FOR THE TREATMENT OF FABRICS WHICH COMPRISES SUBJECTING A KNITTED FABRIC COMPRISING FIBERS OF A CELLULOSE LOWER ALIPHATIC ACID ESTER TO AN AQUEOUS LIQUID AT A TEMPPERATURE OF AT LEAST 250* F. BUT BELOW THE MELTING POINT OF THE FABRIC AND UNDER SUPERATMOSPHERIC PRESSURE, SAID CELLULOSE ESTER CONTAINING AT MOST 0.29 FREE OH GROUP PER ANHYDROGLUCOSE UNIT, THE REMAINING GROUPS BEING CELLULOSE ESTER GROUPS, SUCH THAT MOST OF SAID ANHYDROGLUCOSE UNITS CONTAIN THREE ESTER GROUPS, AND THEN BLEACHING SAID FABRIC AT A PH NOT EXCEEDING ABOUT 9.5 TO OBTAIN A CELLULOSE ESTER FABRIC OF IMPROVED DIMENSIONAL STABILITY.
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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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |