US2842422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bleaching organic textile materials with alkali metal chlorites containing an ester which controls the evolution of chlorine dioxide
Assignee: Rhodiaceta SA
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Filing: 1955-02-21
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Granted: 1958-07-08
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Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 Mosse Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:57
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/20; D06L4/22; D06L4/24; D06L4/26; Y; Y10; Y10S; Y10S8/00; Y10S8/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR BLEACHING ORGANIC TEXTILE MATERIALS, SAID PROCESS COMPRISING BLEACHING SAID MATERIALS IN AN AQUEOUS SOSLUTION OF AN ALKALI METAL SALT OF CHLOROUS ACID HAVING A TEMPERATURE OF FROM 40* TO 150*C., IN WHICH IS DISSOLVED AN ESTER SELECTED FROM THE GROUP CONSISTING OF ETHYL ACETATE, GLYCOL FORMATE, GLYCEROL FORMATE, GLYCOL ACETATES, GLYCEROL ACETATES, ETHYL LACTATER, THEYL TARTRATE, ETHYL PHTHALATE AND Y-BUTYROLACTONE, THE SOLUTION BEING FREE FROM ACIDS, ACIDIC SALTS AND COMPOUNDS OXIDIZABLE TO YIELD ACIDS, SAID SOLUTION CONTAINING 0.1 TO 20 GRAMS OF THE ESTER PR LITER AND THE CHLORITE AND ESTER BEING INITIALLY IN THE PROPORTION TO GIVE SAID SOLUTION A PH BETWEEN 8 AND 6.
Claim 2
Dependent Claim
109 words
A PROCESS FOR BLEACHING ORGANIC TEXTILE MATERIALS, SAID PROCESS COMPRISING BLEACHING SAID MATERIALS IN AN AQUEOUS SOSLUTION OF AN ALKALI METAL SALT OF CHLOROUS ACID HAVING A TEMPERATURE OF FROM 40* TO 150*C., IN WHICH IS DISSOLVED AN ESTER SELECTED FROM THE GROUP CONSISTING OF ETHYL ACETATE, GLYCOL FORMATE, GLYCEROL FORMATE, GLYCOL ACETATES, GLYCEROL ACETATES, ETHYL LACTATER, THEYL TARTRATE, ETHYL PHTHALATE AND Y-BUTYROLACTONE, THE SOLUTION BEING FREE FROM ACIDS, ACIDIC SALTS AND COMPOUNDS OXIDIZABLE TO YIELD ACIDS, SAID SOLUTION CONTAINING 0.1 TO 20 GRAMS OF THE ESTER PR LITER AND THE CHLORITE AND ESTER BEING INITIALLY IN THE PROPORTION TO GIVE SAID SOLUTION A PH BETWEEN 8 AND 6.
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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |