US3658994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning agents comprising an anionic surfactant and a skin-protecting component
Assignee: Hoechst AG
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Filing: 1969-08-19
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Granted: 1972-04-25
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Expires: 1989-08-19
Abstract
Abstract CLEANING AGENTS COMPRISING ANIONINC SURFACTANTS WHICH MAY TEND TO IRRITATE THE SKIN IN ADMIXUTRE WITH A SKINPROTECTION AGENT WHICH IS A DICARBOXYLIC ACID SEMI-AMIDE OF AN ALKYLENE DIAMINE OR OF EHTYLENE TRIAMINE, OF THE FORMULA R1-NH-((CH2)X-NH)N-CO-R2 WHEREIN R1 IS HYDROGEN, ALKYL, OR ALKYLENE; R2 IS -CH2-CH2-COOH,-CH=CH-COOH OR -(1,2-PHENYLENE)-COOH AND N AND X ARE SMALL INTEGERS.
Inventors
- 👤 Gerhard Kaiser
- 👤 Gunther Tauber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:37
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/04; C11D1/10; C11D3/00; C11D3/16; C11D3/26; C11D3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |