Patent US3369855A successfully refreshed from Google Patents.
US3369855A
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Levelling sulfur and vat dyes with low molecular weight polyamides
Assignee: BASF SE
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Filing: 1961-10-24
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Granted: 1968-02-20
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Expires: 1981-10-24
Abstract
No abstract record available.
Inventors
- 👤 Bjarne Hartmark
- 👤 Hans-Gerhard Reppe
- 👤 Rudolf Rokohl
- 👤 Matthias Seefelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:54
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/5264; D06P1/5278; D06P1/22; D06P1/30; Y; Y10; Y10S; Y10S8/00; Y10S8/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN A PROCESS FOR DYEING TEXTIEL MATERIALS WITH VAT AND SULFUR DYES THE IMPROVEMENT COMPRISING LEVELING THE DYEINGS BY CONTACTING THE DYED TEXTILE MATERIALS IN AN ALKALINE WAT WITH A WATER-SOLUBLE POLYAMIDE HAVING A MEAN MOLECULAR WEIGHT BETWEEN 600 AND 1500, SAID POLYAMIDE BEING DERIVED FROM (A) A POLYAMINE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
53 words
IN A PROCESS FOR DYEING TEXTIEL MATERIALS WITH VAT AND SULFUR DYES THE IMPROVEMENT COMPRISING LEVELING THE DYEINGS BY CONTACTING THE DYED TEXTILE MATERIALS IN AN ALKALINE WAT WITH A WATER-SOLUBLE POLYAMIDE HAVING A MEAN MOLECULAR WEIGHT BETWEEN 600 AND 1500, SAID POLYAMIDE BEING DERIVED FROM (A) A POLYAMINE OF THE GENERAL FORMULA
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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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |