US3801546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of textile finishing agents comprising condensing urea and hcho followed by condensation with glyoxal
Assignee: BASF SE
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Filing: 1973-02-28
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Granted: 1974-04-02
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Expires: 1993-02-28
Abstract
Abstract MANUFACTURE OF STABLE LIQUID SHRINK AND WRINKLE RESIST FINISHES FOR CELLULOSIC TEXTILES BY CINDENSING UREA AND FORM ALDEHYDE IN AQUEOUS SOLUTION AT A MOLAR RATIO OF FROM 1:2 TO 1:10 IN A FIRST STAGE AT PH''S OF FROM 7 TO 10, IN A SECOND STAGE AT PH''S OF FROM3.1 TO AND IN A THIRD SAGE AT PH''S OF FROM 6 TO 7, SUFFICIENT QUANTITIES OF GLYOXAL AND ADDITIONAL UREA AND, IF NECESSARY, ADDITIONAL FORMALDEHYDE BEING ADDED T THE COMMENCEMENT OFMTHE THIRD STAGE TO GIVE A TOTAL MOLAR RATIO OF UREA TO FORMALDEHYDE TO GLYOXAL OF 1:1.5 TO2.5:0.0.3 TO 0.6.
Inventors
- 👤 H Bille
- 👤 G Reuss
- 👤 H Petersen
- 👤 W Ruemens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:21
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12
Claims Analysis
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |