Patent US3273955A successfully refreshed from Google Patents.
US3273955A
Expired / Lapsed
US
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Process for reduction of vat anthraquinone dyestuffs
Assignee: GOERRIG
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Filing: 1964-01-14
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Granted: 1966-09-20
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Expires: 1984-01-14
Abstract
No abstract record available.
Inventors
- 👤 Dieter Goerrig
- 👤 Friedrich Schubert
- 👤 Eberhard Weise
- 👤 Manfred Soell
- 👤 Konrad Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:12
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/221; B; B01; B01J; B01J27/00; B01J27/24; B01J31/00; B01J31/02; B01J31/12; B01J31/14; B01J31/146; B01J2231/00; B01J2231/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A PROCESS FOR THE REDUCTION OF A VAT ANTHRAQUINONE DYESTUFF WITH AN ALKALI-METAL BOROHYDRIDE, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE REDUCTION IN THE PRESENCE OF A CATALYTIC PROPORTION OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF (A) METAL COMPLEX COMPOUNDS FROM WHICH THE METAL ON WHICH THEY ARE BASED CAN BE SEPARATED IN THE PRESENCE OF A REDUCING AGENT AT A REDOX POTENTIAL BETWEEN 0 AND -1.5 VOLTS AT A PH VALUE BETWEEN 8 AND 15, (B) WATER-SOLUBLE ANTHRAQUINONE COMPOUNDS WHICH FROM A COMPONENT OF AN ORGANIC REDOX SYSTEM THE POTENTIAL OF WHICH LIES BETWEEN 0 AND -1.5 VOLTS AT A PH VALUE BETWEEN 8 AND 15, AND WHERE THE REDUCTION FO THIS ORGANIC REDOX SYSTEM INVOLVES HYDROGENATION AND ITS OXIDATION INVOLVES DEHYDROGENATION, AND MIXTURES OF THESE COMPOUNDS.
Claim 2
Dependent Claim
132 words
IN A PROCESS FOR THE REDUCTION OF A VAT ANTHRAQUINONE DYESTUFF WITH AN ALKALI-METAL BOROHYDRIDE, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE REDUCTION IN THE PRESENCE OF A CATALYTIC PROPORTION OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF (A) METAL COMPLEX COMPOUNDS FROM WHICH THE METAL ON WHICH THEY ARE BASED CAN BE SEPARATED IN THE PRESENCE OF A REDUCING AGENT AT A REDOX POTENTIAL BETWEEN 0 AND -1.5 VOLTS AT A PH VALUE BETWEEN 8 AND 15, (B) WATER-SOLUBLE ANTHRAQUINONE COMPOUNDS WHICH FROM A COMPONENT OF AN ORGANIC REDOX SYSTEM THE POTENTIAL OF WHICH LIES BETWEEN 0 AND -1.5 VOLTS AT A PH VALUE BETWEEN 8 AND 15, AND WHERE THE REDUCTION FO THIS ORGANIC REDOX SYSTEM INVOLVES HYDROGENATION AND ITS OXIDATION INVOLVES DEHYDROGENATION, AND MIXTURES OF THESE COMPOUNDS.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |