Patent US3574515A successfully refreshed from Google Patents.
US3574515A
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US
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Process for dyeing and printing of cellulose fibre materials using a copper ammine complex of trimethylamine-tricarboxylic acid
Assignee: Bayer AG
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Filing: 1968-07-05
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Granted: 1971-04-13
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Expires: 1988-07-05
Abstract
Abstract IN THE DYEING AND PRINTING OF CELLULOSE FIBRE MATERIALS, THE FIBRE IS TREATED WITH AN IMINO-ISOINDOLENINE IN THE PRESENCE OF A COPPER AMMINE COMPLEX OF TRIMETHYLAMINE-TRICARBOXYLIC ACID.
Inventors
- 👤 Andreas Huppertz
- 👤 Gunther Neumann
- 👤 Walther Wolf
- 👤 Hellmut Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:20
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/14; D06P1/145; C; C09; C09B; C09B47/00; C09B47/04; C09B47/06; C09B47/073; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |