US2909404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of polyamide fibers during treatment with peroxide containing bleaching or washing agents
Assignee: Evonik Operations GmbH
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Filing: 1954-03-11
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Granted: 1959-10-20
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Expires: 1974-03-11
Abstract
No abstract record available.
Inventors
- 👤 Dithmar Karl
- 👤 Naujoks Elfriede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:15
CPC Classifications
C; C11; C11D; C11D9/00; C11D9/04; C11D9/22; C11D9/30; C11D3/00; C11D3/16; C11D3/26; C11D3/39; C11D3/3902; C11D9/42; D; D06; D06L; D06L4/00; D06L4/10; D06L4/12; D06M; D06M13/00; D06M13/322; D06M13/325; D06M13/332; D06M13/335; D06M13/35; D06M13/376; D06M13/402; D06M13/432; D21; D21C; D21C9/00; D21C9/02; Y; Y10; Y10S; Y10S8/00; Y10S8/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN A PROCESS FOR THE TREAMENT OF MATERIALS CONTAINING POLYAMIDE SYNTHETIC FIBERS WITH AN AQUEOUS SOLUTION CONTAINING A PEROXIDE IN A QUANTITY TO PROVIDE AN ACTIVE OXYGEN CONTENT OF UP TO ABOUT 5G. PER LITER, THE STEP WHICH COMPRISES INCORPORATING IN SUCH AQUEOUS SOLUTION 0.001 TO 0.05 MOLE PER LITER AN ORGANIC COMPOUND CONTAINING AT LEAST TWO NITROGEN ATOMS OF WHICH AT LEAST ONE IS IN THE FORM OF AN AMINO GROUP SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINO GROUPS AND ANY OTHER IS IN THE FORM OF A GROUP SELECTED FROM THE GROUP CONSISTING OF PRIMARY AMINO, SECONDARY AMINO AND TERTIARY AMINO GROUPS, SAID NITROGEN ATOMS BEING LINKED TOGETHER BY A CHAIN CONTAINING UP TO 6 CARBON ATOMS, THE QUANTITY OF ORGANIC COMPOUND INCORPORATED BEING SUFDETERIORATION DURING THE TREAMENT WITH THE AQUEOUS PEROXIDE CONTAINING SOLUTION.
Claim 2
Dependent Claim
139 words
IN A PROCESS FOR THE TREAMENT OF MATERIALS CONTAINING POLYAMIDE SYNTHETIC FIBERS WITH AN AQUEOUS SOLUTION CONTAINING A PEROXIDE IN A QUANTITY TO PROVIDE AN ACTIVE OXYGEN CONTENT OF UP TO ABOUT 5G. PER LITER, THE STEP WHICH COMPRISES INCORPORATING IN SUCH AQUEOUS SOLUTION 0.001 TO 0.05 MOLE PER LITER AN ORGANIC COMPOUND CONTAINING AT LEAST TWO NITROGEN ATOMS OF WHICH AT LEAST ONE IS IN THE FORM OF AN AMINO GROUP SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINO GROUPS AND ANY OTHER IS IN THE FORM OF A GROUP SELECTED FROM THE GROUP CONSISTING OF PRIMARY AMINO, SECONDARY AMINO AND TERTIARY AMINO GROUPS, SAID NITROGEN ATOMS BEING LINKED TOGETHER BY A CHAIN CONTAINING UP TO 6 CARBON ATOMS, THE QUANTITY OF ORGANIC COMPOUND INCORPORATED BEING SUFDETERIORATION DURING THE TREAMENT WITH THE AQUEOUS PEROXIDE CONTAINING SOLUTION.
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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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |