US3265463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous method of imparting wet and dry crease resistance to cellulosic materials through reaction with formaldehyde
Assignee: Burlington Industries Inc
•
Filing: 1961-11-17
•
Granted: 1966-08-09
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Expires: 1981-11-17
Abstract
No abstract record available.
Inventors
- 👤 Richard P Barber
- 👤 John D Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:21
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/127
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR IMPROVING THE WASH AND WEAR PROPERTIES OF A CELLULOSIC FABRIC COMPRISING TREATING THE FABRIC WITH AN AQUEOUS MEDIUM UNTIL THE FABRIC CONTAINS 10-100% OF ITS OWN WEIGHT OF WATER; SUBSTANTIALLY IMMEDIATELY THEREAFTER PASSING THE WET FABRIC INTO A DEHYDRATING SOLUTION SELECTED FROM THE GROUP CONSISTING OF (A) AQUEOUS CALCIUM CHLORIDE SOLUTION CONTAINING AT LEAST 3% FORMALDEHYDE AND (B) ANHYDROUS ACETIC ACID CONTAINING AT LEAST 3% FORMALDEHYDE WHEREBY THE FORMALDEHYDE REACTS WITH SAID FABRIC; WASHING THE THUS TREATED FABRIC WITH WATER TO REMOVE FREE FORMALDEHYDE; APPLYING TO THE FABRIC FROM 0.5 TO 6% BY WEIGHT, BASED ON THE DRY WEIGHT OF SAID FABRIC, OF A LATENT CATALYST FOR CURING FORMALDEHYDE RESINS; DYING THE FABRIC AT A TEMPERATURE BELOW 150*C. AND THEN CURING BY HEATING AT A TEMPERATURE ABOVE 150*C.
Claim 2
Dependent Claim
131 words
A PROCESS FOR IMPROVING THE WASH AND WEAR PROPERTIES OF A CELLULOSIC FABRIC COMPRISING TREATING THE FABRIC WITH AN AQUEOUS MEDIUM UNTIL THE FABRIC CONTAINS 10-100% OF ITS OWN WEIGHT OF WATER; SUBSTANTIALLY IMMEDIATELY THEREAFTER PASSING THE WET FABRIC INTO A DEHYDRATING SOLUTION SELECTED FROM THE GROUP CONSISTING OF (A) AQUEOUS CALCIUM CHLORIDE SOLUTION CONTAINING AT LEAST 3% FORMALDEHYDE AND (B) ANHYDROUS ACETIC ACID CONTAINING AT LEAST 3% FORMALDEHYDE WHEREBY THE FORMALDEHYDE REACTS WITH SAID FABRIC; WASHING THE THUS TREATED FABRIC WITH WATER TO REMOVE FREE FORMALDEHYDE; APPLYING TO THE FABRIC FROM 0.5 TO 6% BY WEIGHT, BASED ON THE DRY WEIGHT OF SAID FABRIC, OF A LATENT CATALYST FOR CURING FORMALDEHYDE RESINS; DYING THE FABRIC AT A TEMPERATURE BELOW 150*C. AND THEN CURING BY HEATING AT A TEMPERATURE ABOVE 150*C.
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |