Patent US3531238A successfully refreshed from Google Patents.
US3531238A
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Process for the continuous dyeing or printing with basic dyestuffs of textile materials consisting of polyacrylonitrile
Assignee: Bayer AG
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Filing: 1967-02-28
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Granted: 1970-09-29
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Expires: 1987-02-28
Abstract
No abstract record available.
Inventors
- 👤 Udo Hendricks
- 👤 Robert Kuth
- 👤 Werner Langmann
- 👤 Mathieu Quaedvlieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:26
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/6421; D06P3/00; D06P3/70; D06P3/76; Y; Y10; Y10S; Y10S8/00; Y10S8/933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2939759A
Cited
US3325421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |