Patent US2930792A successfully refreshed from Google Patents.
US2930792A
Expired / Lapsed
US
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Method for conditioning vat dye filter cakes
Assignee: Honeywell International Inc
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Filing: 1957-07-31
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Granted: 1960-03-29
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Expires: 1977-07-31
Abstract
No abstract record available.
Inventors
- 👤 Maurice H Fleysher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:32
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0077
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF CONDITIONING AN ANTHRAQUINONE VAT DYE, WHICH COMPRISES SUBJECTING AN ANTHRAQUINONE VAT DYE, IN THE FORM OF AN AQUEOUS PULP WHICH HAS BEEN PRODUCED BY PRECIPITATION OF THE VAT DYE FROM AN AQUEOUS MEDIUM FOLLOWED BY SEPARATION OF THE PRECIPITATE, TO MILLING IN ADMIXTURE WITH A SOLID WATER-SOLUBLE ALKALI METAL SALT OF AN INORGANIC ACID IN A SATURATED AQUEOUS SOLUTION OF A WATER-SOLUBLE ALKALI METAL SALT OF AN INORGANIC ACID.
Claim 2
Independent Claim
72 words
A METHOD OF CONDITIONING AN ANTHRAQUINONE VAT DYE, WHICH COMPRISES SUBJECTING AN ANTHRAQUINONE VAT DYE, IN THE FORM OF AN AQUEOUS PULP WHICH HAS BEEN PRODUCED BY PRECIPITATION OF THE VAT DYE FROM AN AQUEOUS MEDIUM FOLLOWED BY SEPARATION OF THE PRECIPITATE, TO MILLING IN ADMIXTURE WITH A SOLID WATER-SOLUBLE ALKALI METAL SALT OF AN INORGANIC ACID IN A SATURATED AQUEOUS SOLUTION OF A WATER-SOLUBLE ALKALI METAL SALT OF AN INORGANIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |