US2820690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of bleaching cotton with hydrogen peroxide bleach stabilized with calcium ormagnesium orthophosphate
Assignee: BECCO CHEMICAL DIVISION FOOD M
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Filing: 1954-07-26
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Granted: 1958-01-21
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Expires: 1974-07-26
Abstract
No abstract record available.
Inventors
- 👤 Feldmann Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:15
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN THE PROCESS OF CONTINUOUSLY BLEACHING COTTON FABRIC WHEREIN SAID FABRIC IS CONTINUOUSLY MOVED FROM A SUPPLY STATION TO A STORAGE J BOX AND REMOVED AND THE MOVING FABRIC IS FIRST IMPREGNATED WITH A BLEACHING CONCENTRATION OF STABILIZED HYDROGEN PEROXIDE AND THEREAFTER STEAMED IN THE J BOX UNTIL THE FABRIC IS BLEACHED, THAT IMPROVEMENT WHICH COMPRISES STABILIZING SAID PEROXIDE WITH A STABILIZING AMOUNT OF AT LEAST 0.017 MOLE PER LITER OF ORTHOPHOSPHATE IONS IN THE PRESENCE OF A STABILIZING AMOUNT OF AT LEAST ABOUT 100 PARTS PER MILLION OF ALKALINE EARTH METAL IONS SELECTED FROM THE GROUP CONSISTING OF CALCIUM IONS AND MAGNESIUM IONS, SAID IONS FORMING STABILIZING AMOUNTS OF CALCIUM AND MAGNESIUM ORTHOPHOSPHATE, THE STABILIZED SOLUTION BEING BUFFERED TO FROM PH 9 TO PH 11 WITH A BUFFERING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL BORATES AND ALKALI METAL ORTHOPHOSPHATES.
Claim 2
Dependent Claim
143 words
IN THE PROCESS OF CONTINUOUSLY BLEACHING COTTON FABRIC WHEREIN SAID FABRIC IS CONTINUOUSLY MOVED FROM A SUPPLY STATION TO A STORAGE J BOX AND REMOVED AND THE MOVING FABRIC IS FIRST IMPREGNATED WITH A BLEACHING CONCENTRATION OF STABILIZED HYDROGEN PEROXIDE AND THEREAFTER STEAMED IN THE J BOX UNTIL THE FABRIC IS BLEACHED, THAT IMPROVEMENT WHICH COMPRISES STABILIZING SAID PEROXIDE WITH A STABILIZING AMOUNT OF AT LEAST 0.017 MOLE PER LITER OF ORTHOPHOSPHATE IONS IN THE PRESENCE OF A STABILIZING AMOUNT OF AT LEAST ABOUT 100 PARTS PER MILLION OF ALKALINE EARTH METAL IONS SELECTED FROM THE GROUP CONSISTING OF CALCIUM IONS AND MAGNESIUM IONS, SAID IONS FORMING STABILIZING AMOUNTS OF CALCIUM AND MAGNESIUM ORTHOPHOSPHATE, THE STABILIZED SOLUTION BEING BUFFERED TO FROM PH 9 TO PH 11 WITH A BUFFERING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL BORATES AND ALKALI METAL ORTHOPHOSPHATES.
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US1155102A
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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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |