Patent US3990845A successfully refreshed from Google Patents.
US3990845A
Expired / Lapsed
US
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Process for the fixation of dyestuffs
Assignee: Hoechst AG
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Filing: 1974-04-05
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Granted: 1976-11-09
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Expires: 1994-04-05
Abstract
Abstract Process for the fixation of dyestuffs on textile materials of synthetic, regenerated or native fibers or of mixtures thereof, in which the textile material treated with a dyestuff preparation is introduced into a chamber and it is dwelled there, batched or cuttled up under pressure-steam.
Inventors
- 👤 Hans-Ulrich von der Eltz
- 👤 Richard Gross
- 👤 Walter Birke
- 👤 Albert Reuther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:34
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/52; D06P3/54; D06B; D06B17/00; D06B17/04; D06B19/00; D06B19/0005; D06B19/0029; D06P3/02; D06P3/04; D06P3/24; D06P3/241; D06P3/58; D06P3/60; D06P3/6033; D06P3/82; D06P3/8204; D06P3/8223; D06P3/8228; D06P3/8233; D06P5/00; D06P5/20; D06P5/2022; D06P5/2044; D06P5/2066; D06P5/2077
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
In a process for a fixation of a dyestuff on a textile material of synthetic, regenerated or natural fibers or of mixtures thereof by means of pressure-steaming, the improvement of which comprises: introducing said textile material treated with a dyestuff preparation into a steam-pressurized zone in an unwound state, winding up said textile material in said zone, continuing to expose for 1 to 30 minutes said textile material to steam while in a wound up condition without rotation of same, said steam being at an excess pressure from 1.0 to 3.0 atmospheres gauge.
Claim 2
Dependent Claim
93 words
In a process for a fixation of a dyestuff on a textile material of synthetic, regenerated or natural fibers or of mixtures thereof by means of pressure-steaming, the improvement of which comprises: introducing said textile material treated with a dyestuff preparation into a steam-pressurized zone in an unwound state, winding up said textile material in said zone, continuing to expose for 1 to 30 minutes said textile material to steam while in a wound up condition without rotation of same, said steam being at an excess pressure from 1.0 to 3.0 atmospheres gauge.
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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |