US2857235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dyeing wool with vat dyes
Assignee: Individual
•
Filing: 1954-07-19
•
Granted: 1958-10-21
•
Expires: 1974-07-19
Abstract
No abstract record available.
Inventors
- 👤 Salvatore G Coscia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:22
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/14; D06P3/141; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS OF DYEING WOOL FIBERS, COMPRISING CONTACTING SAID WOOL FIBERS FOR A PERIOD OF FROM ABOUT 10 TO ABOUT 60 SECONDS WITH A BATH CONTAINING DISSOLVED THEREIN AN ANTHRAQUINONE VAT DYE, ALKALI HYDROSULFITE AND CAUSTIC ALKALI, THE AMOUNT OF SAID CAUSTIC ALKALI BEING REGULATED TO MAINTAIN AN ELECTROMETRICALLY DETERMINED PH VALUE OF NOT LESS THAN ABOUT 12.8 AND NOT MORE THAN ABOUT 13.1 IN SAID BATH, THE TEMPERATURE OF SAID BATH BEING BETWEEN ABOUT 120*F. AND ABOUT 160*F., SO AS TO EFFECT DEEP-DYEING OF SAID WOOL AT ITS POINT OF MAXIMUM AFFINITY FOR SAID VAT DYE AND BEFORE WOOL FIBER DAMAGE OCCURS FOR SAID PH VALUE, AND IMMEDIATELY THEREAFTER SUBSTANTIALLY NEUTRALIZING SAID WOOL FIBERS.
Claim 2
Dependent Claim
115 words
A PROCESS OF DYEING WOOL FIBERS, COMPRISING CONTACTING SAID WOOL FIBERS FOR A PERIOD OF FROM ABOUT 10 TO ABOUT 60 SECONDS WITH A BATH CONTAINING DISSOLVED THEREIN AN ANTHRAQUINONE VAT DYE, ALKALI HYDROSULFITE AND CAUSTIC ALKALI, THE AMOUNT OF SAID CAUSTIC ALKALI BEING REGULATED TO MAINTAIN AN ELECTROMETRICALLY DETERMINED PH VALUE OF NOT LESS THAN ABOUT 12.8 AND NOT MORE THAN ABOUT 13.1 IN SAID BATH, THE TEMPERATURE OF SAID BATH BEING BETWEEN ABOUT 120*F. AND ABOUT 160*F., SO AS TO EFFECT DEEP-DYEING OF SAID WOOL AT ITS POINT OF MAXIMUM AFFINITY FOR SAID VAT DYE AND BEFORE WOOL FIBER DAMAGE OCCURS FOR SAID PH VALUE, AND IMMEDIATELY THEREAFTER SUBSTANTIALLY NEUTRALIZING SAID WOOL FIBERS.
References Cited (Backward Citations)
US2508714A
Cited
US2508203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |