Patent US4040393A successfully refreshed from Google Patents.
Patent US3630998A successfully refreshed from Google Patents.
US3630998A
Expired / Lapsed
US
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Process for the manufacture of watersoluble curable condensates containing carboxyl groups
Assignee: BASF Schweiz AG
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Filing: 1968-09-30
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Granted: 1971-12-28
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Expires: 1988-09-30
Abstract
Abstract THE PRESENT INVENTION PROVIDES A PROCESS FOR THE MANUFACTURE OF WATER-SOLUBLE, CURABLE CONDENSATES CONTAINING CARBOXYL GROUPS, WHEREIN THE METHYLOL GROUPS OF AMINOPLAST PRECONDENSATES ARE ETHERIFIED WITH MONOHYDROXY COMPOUNDS AND ALIPHATIC HYDROXYCARBOXYLIC ACID ESTERS AND THEN THE CARBOXYLIC ACID ESTER GROUPS ARE HYDROLYZED IN AN ALKALINE MEDIUM. THE CONDENSATES ARE USEFUL REACTIVE TENSIDES.
Inventors
- 👤 Luzius Schibler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:38
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |