Patent US3142531A successfully refreshed from Google Patents.
US3142531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bleaching of gray cotton knit goods
Assignee: Honeywell International Inc
•
Filing: 1961-02-08
•
Granted: 1964-07-28
•
Expires: 1981-02-08
Abstract
No abstract record available.
Inventors
- 👤 Stuart M Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:17
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/30; D06L4/60; D06L4/657; D06L4/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD FOR BLEACHING GRAY COTTON KNIT GOODS WHICH CONSISTS OF IMMERSING THE GRAY COTTON KNIT GOODS IN A BATH OF AN AQUEOUS SOLUTION CONSISTING OF 0.5-5 GRAMS PER LITRE OF AN OPTICAL FLUORESCENT BRIGHTENING AGENT AND 1.25-4 GRAMS PER LITER OF A POLYALKOXY ALKANOL PHENYL ESTER SURFACE ACTIVE WETTING AGENT AT A TEMPERATURE WITHIN THE RANGE 140*F.-190*F., KEEPING THE GOODS IMMERSED IN SAID AQUEOUS SOLUTION BATH FOR A TIME OF FROM ABOUT 1-10 MINUTES AT TEMPERATURES WITHIN THE FORESAID RANGE, THEN DIRECTLY SQUEEZING THE GOODS TO A 150-225% SATURATION, THEN IMMERSING THE SQUEEZED GOODS IN AN AQUEOUS ALKALINE HYDROGEN PEROXIDE BLEACHING SOLUTION CONSISTING OF 1-6 GRAMS PER LITER OF SODIUM HYDROXIDE, ABOUT 7-10 GRAMS PER LITER HYDROGEN PEROXIDE AND FROM ABOUT 0.5-2
Claim 2
Independent Claim
123 words
A METHOD FOR BLEACHING GRAY COTTON KNIT GOODS WHICH CONSISTS OF IMMERSING THE GRAY COTTON KNIT GOODS IN A BATH OF AN AQUEOUS SOLUTION CONSISTING OF 0.5-5 GRAMS PER LITRE OF AN OPTICAL FLUORESCENT BRIGHTENING AGENT AND 1.25-4 GRAMS PER LITER OF A POLYALKOXY ALKANOL PHENYL ESTER SURFACE ACTIVE WETTING AGENT AT A TEMPERATURE WITHIN THE RANGE 140*F.-190*F., KEEPING THE GOODS IMMERSED IN SAID AQUEOUS SOLUTION BATH FOR A TIME OF FROM ABOUT 1-10 MINUTES AT TEMPERATURES WITHIN THE FORESAID RANGE, THEN DIRECTLY SQUEEZING THE GOODS TO A 150-225% SATURATION, THEN IMMERSING THE SQUEEZED GOODS IN AN AQUEOUS ALKALINE HYDROGEN PEROXIDE BLEACHING SOLUTION CONSISTING OF 1-6 GRAMS PER LITER OF SODIUM HYDROXIDE, ABOUT 7-10 GRAMS PER LITER HYDROGEN PEROXIDE AND FROM ABOUT 0.5-2
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |