US3143459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonfoaming wettable powder compositions
Assignee: Wyeth Holdings LLC
•
Filing: 1958-04-10
•
Granted: 1964-08-04
•
Expires: 1978-04-10
Abstract
No abstract record available.
Inventors
- 👤 Alfred F Marks
- 👤 Ilse B Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:34
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/30; A01N47/00; A01N47/40; A01N47/42; A01N47/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD OF PREPARING A NONFOAMING WETTABLE POWDER COMPOSITION WHICH COMPRISES: IMPREGNATING AN EMULSION OF A SILICONE-BASED, WATER-DISPERSIBLE ANTIFOAM AGENT ON A FINELY GROUND INERT POWDER CARRIER TO GIVE A MIXTURE CONTAINING FROM 10 TO 25% OF THE ANTIFOAM EMULSION; BLENDING THE RESULTANT MIXTURE WITH A MIXTURE CONSISTING OF ADDITIONAL INERT POWDER CARRIER, A WETTING AND DISPERSING SURFACE-ACTIVE AGENT, AND AN ALKYL GUANIDINE SALT OF THE FORMULA:
Claim 2
Independent Claim
67 words
A METHOD OF PREPARING A NONFOAMING WETTABLE POWDER COMPOSITION WHICH COMPRISES: IMPREGNATING AN EMULSION OF A SILICONE-BASED, WATER-DISPERSIBLE ANTIFOAM AGENT ON A FINELY GROUND INERT POWDER CARRIER TO GIVE A MIXTURE CONTAINING FROM 10 TO 25% OF THE ANTIFOAM EMULSION; BLENDING THE RESULTANT MIXTURE WITH A MIXTURE CONSISTING OF ADDITIONAL INERT POWDER CARRIER, A WETTING AND DISPERSING SURFACE-ACTIVE AGENT, AND AN ALKYL GUANIDINE SALT OF THE FORMULA:
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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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |