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Patent US2903324A successfully refreshed from Google Patents.
US2903324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hasoi
Assignee: —
•
Filing: —
•
Granted: 1959-09-08
•
Expires: 1976-09-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:02
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/14; D06P1/00; D06P1/02; D06P1/10; D06P1/38; D06P1/44; D06P1/673; D06P1/67316; D06P3/58; D06P3/60; D06P3/66; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD FOR THE DYEING OF WOOL WITH WATER-SOLUBLE COMPLEX HEAVY METAL COMPOUNDS OF DYESTUFFS SELECTED FROM THE GROUP CONSISTING OF MONOAZO AND AZO METHINE DYESTUFFS OF THE TUPE CONTAINING TWO DYESTUFF MOLECULES CO-ORDINATED WITH ONE HEAVY METAL ATOM AND WHICH, WITH THE EXCEPTION OF CARBOXYLIC ACID GROUPS PARTICIPATING IN COMPLEX FORMATION DO NOT CONTAIN ANY ACID WATER SOLUBILISING GROUPS, WHICH COMPRISES PRE-TREATING WOOL IN CIRCULATING HOT WATE WITH A STRONGLY DISSOCIATING POLYBASIC MINERAL ACID, ADJUSTING THE ACID REACTION OF SAID HOT WATER TO A CONSTANT PH VALUE OF FROM 4 TO 6, THEN ADDING AN AQUEOUS SOLUTION OF THE DYESTUFF AND DYEING IN A CLOSED DYEING VESSEL UNDER STATIC GAS PRESSURE OF AT LEAST 3 ATMOSPHERES, BEGINNING BELOW THE BOILING POINT AND FINISHING AT A TEMPERATURE OF FROM 90* TO 115* C.
Claim 2
Independent Claim
133 words
A METHOD FOR THE DYEING OF WOOL WITH WATER-SOLUBLE COMPLEX HEAVY METAL COMPOUNDS OF DYESTUFFS SELECTED FROM THE GROUP CONSISTING OF MONOAZO AND AZO METHINE DYESTUFFS OF THE TUPE CONTAINING TWO DYESTUFF MOLECULES CO-ORDINATED WITH ONE HEAVY METAL ATOM AND WHICH, WITH THE EXCEPTION OF CARBOXYLIC ACID GROUPS PARTICIPATING IN COMPLEX FORMATION DO NOT CONTAIN ANY ACID WATER SOLUBILISING GROUPS, WHICH COMPRISES PRE-TREATING WOOL IN CIRCULATING HOT WATE WITH A STRONGLY DISSOCIATING POLYBASIC MINERAL ACID, ADJUSTING THE ACID REACTION OF SAID HOT WATER TO A CONSTANT PH VALUE OF FROM 4 TO 6, THEN ADDING AN AQUEOUS SOLUTION OF THE DYESTUFF AND DYEING IN A CLOSED DYEING VESSEL UNDER STATIC GAS PRESSURE OF AT LEAST 3 ATMOSPHERES, BEGINNING BELOW THE BOILING POINT AND FINISHING AT A TEMPERATURE OF FROM 90* TO 115* C.
References Cited (Backward Citations)
US2817575A
Cited
US2763530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |