EP0097786A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Use of optionally alkyl-substituted phenolpolyalkylene-glycol ethers as defoamers in paper sizes
Assignee: Huels AG
•
Filing: 1983-04-26
•
Granted: —
•
Expires: 2003-04-26
Abstract
Abstract They have a cloud point of 10-70 DEG C in a 2% strength solution in fully demineralised water and a molecular weight of 600-5000. They contain 6-40 ethylene oxide and 6-40 propylene oxide units as blocks or in random distribution. The alkyl groups can contain 1-14 carbon atoms. They can be used together with known defoamers.
Inventors
- 👤 Fritz Dr. Gude
- 👤 Herbert Haferkorn
- 👤 Wilhelm Dr. Müller
- 👤 Sigrid Dr. Scholz-Weigl
- 👤 Rolf Winter
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 18:08
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0431; B01D19/0436; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35; D21H17/41; D21H17/42; D21H17/43; D21H17/46; D21H17/53
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2937104A
Cited
US3004923A
Cited
US3215635A
Cited
DE1261618B
Cited
US4040900A
Cited
CA1020041A
Cited
US4024072A
Cited
EP0009185A1
Cited
US4230599A
Cited
WO1982000039A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.