US3784648A
Expired / Lapsed
US
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Process for the preparation of free-flowing,lump-free,redispersible,synthetic resin powders
Assignee: Wacker Chemie AG
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Filing: 1971-10-01
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Granted: 1974-01-08
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Expires: 1991-10-01
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS FOR THE PREPARATION OF FREE-FLOWING, LUMP-FREE, REDISPERSIBLE SYNTHETIC RESIN POWDERS BY SPARY-DRYING AQUEOUS DISPERSIONS OF SYNTHETIC RESINS CONTAINING AN ADDED AMOUNT OF A WATER-SOLUBLE CONDENSATION PRODUCT FROM MELAMINE, FORMALDEHYDE AND CONTAINING SULFONATE GROUPS.
Inventors
- 👤 E Bergmeister
- 👤 H Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/122
Claims Analysis
Total Claims: 0
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |