US3148019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of alkaline scouring and peroxide bleaching of gray cotton cloth
Assignee: FMC Corp
•
Filing: 1962-02-09
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Granted: 1964-09-08
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Expires: 1982-02-09
Abstract
No abstract record available.
Inventors
- 👤 Gerald T Gallagher
- 👤 Edward J Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:51
CPC Classifications
D; D06; D06B; D06B17/00; D06B17/02; D06L; D06L4/00; D06L4/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A CONTINUOUS PROCESS FOR BLEACHING DESIZED GRAY COTTON CLOTH WHICH COMPRISES CONTINUOUSLY PASSING SAID CLOTH INTO AN ALKALINE SOLUTION HAVING A CONCENTRATION OF ABOUT 1.5% TO ABOUT 5% BY WEIGHT OF AN ALKALI METAL HYDROXIDE, CONTINUOUSLY WETTING SAID CLOTH WITH FROM 50 TO 150% OF ITS WEIGHT OF SAID ALKALINE SOLUTION, CONTINUOUSLY PASSING SAID WETTED CLOTH INTO ONE SECTION OF A SINGLE TREATING ZONE, CONTINUOUSLY STEAMING SAID CLOTH AT A TEMPERATURE OF ABOUT 200 TO 212*F. FOR FROM ABOUT 15 TO 45 MINUTES AT ONE END OF SAID TRATING ZONE, CONTINUOUSLY PASSING SAID CLOTH CONTAINING SAID AKLALINE SOLUTION DIRECTLY INTO AN AQUEOUS HYDROGEN PEROXIDE SOLUTION CONTAINING AT LEAST 0.7% BY WEIGHT HYDROGEN PEROXIDE AND ABOUT 2% BY WEIGHT OF SODIUM SILICATE AND MAINTAINED AT THE OPPOSITE END OF SAID SINGLE TREATING ZONE, CONTINUOUSLY HEATING SAID CLOTH WHILE IMMERSED WITHIN SAID HYDROGEN PEROXIDE SOLUTION FOR ABOUT 15 TO 45 MINUTES AT A TEMPERATURE OF ABOUT 150 TO 210*F., CONTINUOUSLY ADDING HYDROGEN PEROXIDE AND SODIUM SILI-
Claim 2
Dependent Claim
164 words
A CONTINUOUS PROCESS FOR BLEACHING DESIZED GRAY COTTON CLOTH WHICH COMPRISES CONTINUOUSLY PASSING SAID CLOTH INTO AN ALKALINE SOLUTION HAVING A CONCENTRATION OF ABOUT 1.5% TO ABOUT 5% BY WEIGHT OF AN ALKALI METAL HYDROXIDE, CONTINUOUSLY WETTING SAID CLOTH WITH FROM 50 TO 150% OF ITS WEIGHT OF SAID ALKALINE SOLUTION, CONTINUOUSLY PASSING SAID WETTED CLOTH INTO ONE SECTION OF A SINGLE TREATING ZONE, CONTINUOUSLY STEAMING SAID CLOTH AT A TEMPERATURE OF ABOUT 200 TO 212*F. FOR FROM ABOUT 15 TO 45 MINUTES AT ONE END OF SAID TRATING ZONE, CONTINUOUSLY PASSING SAID CLOTH CONTAINING SAID AKLALINE SOLUTION DIRECTLY INTO AN AQUEOUS HYDROGEN PEROXIDE SOLUTION CONTAINING AT LEAST 0.7% BY WEIGHT HYDROGEN PEROXIDE AND ABOUT 2% BY WEIGHT OF SODIUM SILICATE AND MAINTAINED AT THE OPPOSITE END OF SAID SINGLE TREATING ZONE, CONTINUOUSLY HEATING SAID CLOTH WHILE IMMERSED WITHIN SAID HYDROGEN PEROXIDE SOLUTION FOR ABOUT 15 TO 45 MINUTES AT A TEMPERATURE OF ABOUT 150 TO 210*F., CONTINUOUSLY ADDING HYDROGEN PEROXIDE AND SODIUM SILI-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |