Patent US3301629A successfully refreshed from Google Patents.
US3301629A
Expired / Lapsed
US
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Process for the production of black dyeings on cellulose fabrics
Assignee: Bayer AG
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Filing: 1964-10-09
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Granted: 1967-01-31
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Expires: 1984-10-09
Abstract
No abstract record available.
Inventors
- 👤 Kramer Bernhard
- 👤 Henes Gerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:20
CPC Classifications
C; C09; C09B; C09B35/00; C09B33/00; D; D06; D06P; D06P1/00; D06P1/02; D06P1/12; Y; Y10; Y10S; Y10S534/00; Y10S534/01; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
PROCESS FOR THE PRODUCTION OF BLACK DYEINGS ON CELLU LOSE FABRICS, WHICH COMPRISES APPLYING A MIXTURE OF AZO DYESTUFFS WHICH IN THE FREE ACID STATE ARE OF THE FORMULA
Claim 2
Dependent Claim
29 words
PROCESS FOR THE PRODUCTION OF BLACK DYEINGS ON CELLU LOSE FABRICS, WHICH COMPRISES APPLYING A MIXTURE OF AZO DYESTUFFS WHICH IN THE FREE ACID STATE ARE OF THE FORMULA
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |