Patent US2902385A successfully refreshed from Google Patents.
US2902385A
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Process for the manufacture of finely dispersed water-insoluble dyestuff pastes
Assignee: Bayer AG
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Filing: 1955-08-23
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Granted: 1959-09-01
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Expires: 1975-08-23
Abstract
No abstract record available.
Inventors
- 👤 Raab Hans
- 👤 Hornle Reinhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:40
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR THE MANUFACTORY OF FINELY DISPERSED PASTES OF WATER-INSOLUBLE DYESTUFFS WHICH COMPRISES KNEADING A WATER-INSOLUBLE DYESTUFFS WITH A DISPERSING AGENT CONSISTING ESSENTIALLY OF A DISPERSIVE POLYGLYCOL ETHER IN A QUANTITY OF AT LEAST 10 PERCENT REFERRED TO THE WATERINSOLUBLE DYESTUFF, THE MIXTURE RATIO BEING SUCH THAT THE MIXTURE EXHIBITS AT THE BEGINNING OF THE KNEADING PROCESS A VISCOSITY OF 2000 UP TO 1,000,000 CENTIPOISES.
Claim 2
Dependent Claim
66 words
A PROCESS FOR THE MANUFACTORY OF FINELY DISPERSED PASTES OF WATER-INSOLUBLE DYESTUFFS WHICH COMPRISES KNEADING A WATER-INSOLUBLE DYESTUFFS WITH A DISPERSING AGENT CONSISTING ESSENTIALLY OF A DISPERSIVE POLYGLYCOL ETHER IN A QUANTITY OF AT LEAST 10 PERCENT REFERRED TO THE WATERINSOLUBLE DYESTUFF, THE MIXTURE RATIO BEING SUCH THAT THE MIXTURE EXHIBITS AT THE BEGINNING OF THE KNEADING PROCESS A VISCOSITY OF 2000 UP TO 1,000,000 CENTIPOISES.
References Cited (Backward Citations)
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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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |