US2588640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofugation of textile materials
Assignee: Bozel Maletra SA
•
Filing: 1948-11-04
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Granted: 1952-03-11
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Expires: 1968-11-04
Abstract
No abstract record available.
Inventors
- 👤 Lehmann Rene Leon
- 👤 Lintner Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:45
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12; C08G12/22; C08G12/26; C08G12/30; C08G12/32; C08G12/40; C08G12/42; Y; Y10; Y10S; Y10S8/00; Y10S8/17
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A METHOD OF MANUFACTURING CONDENSATION PRODUCTS EASILY EMULSIFIABLE IN WATER INTENDED FOR ENHANCING THE QUALITIES OF TEXTILE MATERIALS AND MORE PARTICULARLY FOR HLDROPHOBING THE SAME, CONSISTING IN HEATING IN AN ACID MEDIUM A MONOVALENT FATTY ALCOHOL CONTAINING AT LEAST 10 CARBON ATOMS AND NOT MORE THAN 20 CARBON ATOMS, WITH A CONDENSATION PRODUCT RESULTING FROM TWO STEPS: THE FIRST OF WHICH CONSISTS IN THE CONDENSATION OF AN AMIDE SELECTED FROM THE GROUP CONSISTING OF UREA, MELAMINE AND OXAMIDE, IN AN ACID MEDIUM, WITH GLYOXAL; AND THE SECOND STEP CONSISTING IN CONDENSING THE PRODUCT THUS OBTAINED WITH FORMALDEHYDE IN AN ALKALINE MEDIUM, THE AMOUNT OF FATTY ALCOHOL USED BEING SUCH THAT ONLY A PORTION OF THE METHYLOL GROUPS PRESENT IS ETHERIFIED.
References Cited (Backward Citations)
GB494700A
Cited
US2427504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |