US3556710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for bleaching textile fabrics containing portions dyed with a sensitive dyestuff
Assignee: EIDP Inc
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Filing: 1967-12-20
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Granted: 1971-01-19
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Expires: 1987-12-20
Abstract
Abstract TEXTILE FABRICS CONTAINING PORTIONS DYED WITH A SENSITIVE DYESTUFF SUCH AS A VAT DYE, A NAPHTHOL DYE OR CERTAIN COPPER PHTHALOCYANINE DYES, ARE BLEACHED BY SUBJECTING THE FABRIC TO THE ACTION OF A BLEACHING SOLUTION CONTAINING A PEROXYMONOSULFATE, WHICH SOLUTION IS BUFFERED AT A PH OF 5 TO 8.5, PREFERABLY A PH OF 5.5 TO 7. BLEACHING TEMPERATURES UP TO ABOUT THE BOILING POINT OF WATER ARE USABLE. PREFERABLY, THE FABRIC IS SATURATED WITH SUCH A SOLUTION AND THEN BLEACHED IN THE SATURATED STATE.
Inventors
- 👤 Neil J Stalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:29
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/0024; D06L; D06L4/00; D06L4/10; D06L4/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |