US3281202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of scouring and bleaching dyed and undyed cellulose textiles
Assignee: PPG Industries Inc
•
Filing: 1962-10-10
•
Granted: 1966-10-25
•
Expires: 1982-10-10
Abstract
No abstract record available.
Inventors
- 👤 William E Helmick
- 👤 William H Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:18
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/20; D06L4/22; D06L4/23; D06L4/30; D06L4/70; Y; Y10; Y10S; Y10S8/00; Y10S8/93; Y10S8/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD OF BLEACHING TEXTILES CONTAINING FIBERS SELECTED FROM THE GROUP CONSISTNG OF COTTON AND LINEN COMPRISING CONTACTING SAID FIBERS WITH AN AQUEOUS SOLUTION OF FRM 0.1 TO ABOUT 2.0 PERCENT BY WEIGHT OF THE SOLUTION OF A MEMBER OF THE GROUP CONSISTING OF SODIUM CARBONATE AND SODIUM HYDROXIDE, SAID SOLUTION CONTAINING AMMONIUM HYDROXIDE IN A CONCENTRATION OF FROM 0.1 TO 1.3 PERCENT BY WEIGHT OF THE SOLUTION AND BEING AT A PH OF BETWEEN 9 AND 11.5 AND AT TEMPERATURES OF BETWEEN 160* F. TO 250* F., PARTIALLY BLEACHING THE FIBERS AFTER SAID CONTACT WITH AN ALKALINE SOLUTION OF SODIUM HYPOCHLORITE HAVING PH OF BETWEEN 9 AND 12, SOURING THE PARTIALLY BLEACHED
Claim 2
Independent Claim
150 words
A METHOD OF TREATING TEXTILES CONTAINING FIBERS OF THE GROUP CONSISTING OF COTTON AND LINEN AND HAVING DYED PORTIONS WHICH BLEED IN PEROXIDE BLEACHING SOLUTIONS COMPRISING CONTACTING SAID TEXTILES WITH AN AQUEOUS SOLUTION OF FROM 0.1 TO ABOUT 2.0 PERCENT BY WEIGHT OF THE SOLUTION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF SODIUM CARBONATE AND AMMONIUM HYDROXIDE IN A CONCENTRATION OF FROM 0.1 TO 1.3 PERCENT BY WEIGHT OF THE SOLUTION AT A PH OF BETWEEN 9 AND 11,5 AND AT TEMPERATURES BETWEEN 160* F. TO 250* F., PARTIALLY BLEACHING THE TEXTILES AFTER SAID CONTACT WITH AN ALKALINE SOLUTION OF SODIUM HYPOCHLORITE AT A PH OF BETWEEN 9 AND 12, SOURING THE PARTIALLY BLEACHED TEXTILES WITH AN AQUEOUS BISULFITE SOLUTION HAVING A PH BETWEEN 1 TO 5, AND CONTACTING THE BISULFITE TREATED GOODS WITH AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE AT A PH OF BETWEEN 8.5 AND 11.
References Cited (Backward Citations)
US2020437A
Cited
US2202335A
Cited
US2202332A
Cited
US2334066A
Cited
US2366740A
Cited
FR945494A
Cited
FR952514A
Cited
US2903327A
Cited
US3030171A
Cited
US3077372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |