Patent US3127231A successfully refreshed from Google Patents.
US3127231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cposs rlhtktlhui
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:11
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/221; D06P3/00; D06P3/58; D06P3/60; D06P3/6025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN THE DYEING OF A MATERIAL WITH A VAT DYE INVOLVING CONTACTING SAID MATERIAL WITH VAT DYE PIGMENT AND THEREAFTER CONTACTING SAID MATERIAL WITH A HYDROSULFITE VAT DYE REDUCING MEDIUM, THE IMPROVEMENT COMPRISING THE STEP OF PROVIDING IN SAID HYDROSULFITE VAT DYE REDUCING MEDIUM AN ALKALI METAL BOROHYDRIDE AND SUFFICIENT ALKALI METAL HYDROXIDE TO PROVIDE A PH ABOVE 10 TO PROVIDE THE REDUCED VAT DYE IN ALKALI LEUCO FORM, SAID VAT DYE REDUCING MEDIUM CONSISTING ESSENTIALLY OF SAID HYDROSULFITE, SAID ALKALI METAL BOROHYDRIDE AND SAID ALKALI METAL HYDROXIDE.
Claim 2
Dependent Claim
88 words
IN THE DYEING OF A MATERIAL WITH A VAT DYE INVOLVING CONTACTING SAID MATERIAL WITH VAT DYE PIGMENT AND THEREAFTER CONTACTING SAID MATERIAL WITH A HYDROSULFITE VAT DYE REDUCING MEDIUM, THE IMPROVEMENT COMPRISING THE STEP OF PROVIDING IN SAID HYDROSULFITE VAT DYE REDUCING MEDIUM AN ALKALI METAL BOROHYDRIDE AND SUFFICIENT ALKALI METAL HYDROXIDE TO PROVIDE A PH ABOVE 10 TO PROVIDE THE REDUCED VAT DYE IN ALKALI LEUCO FORM, SAID VAT DYE REDUCING MEDIUM CONSISTING ESSENTIALLY OF SAID HYDROSULFITE, SAID ALKALI METAL BOROHYDRIDE AND SAID ALKALI METAL HYDROXIDE.
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) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |