US4338217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifoams
Assignee: Wacker Chemie AG
•
Filing: 1980-01-24
•
Granted: 1982-07-06
•
Expires: 2000-01-24
Abstract
Abstract Antifoams containing an organopolysiloxane and a solid dispersed in said organopolysiloxane, in which at least a portion of the organopolysiloxane is an organopolysiloxane which has a viscosity of from 5 to 40 mm 2 .s -1 at 25° C. and contains on the average at least 0.5 alkoxy groups per Si-atom and has an SiC-bonded monovalent hydrocarbon radical linked to each silicon atom.
Inventors
- 👤 Ewald Pirson
- 👤 Jakob Schmidlkofer
- 👤 Ernst Innertsberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:23
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
75 words
An antifoam consisting essentially of an organopolysiloxane consisting of units of the formula ##EQU2## in which R is an alkyl radical having from 1 to 4 carbon atoms, n has an average value of from 0.5 to 1.4 and a viscosity of from 5 to 40 mm 2 .s -1 at 25° C. and from 0.1 to 30 percent by weight based on the weight of the organopolysiloxane of a solid dispersed in said organopolysiloxane.
Claim 2
Dependent Claim
75 words
An antifoam consisting essentially of an organopolysiloxane consisting of units of the formula ##EQU2## in which R is an alkyl radical having from 1 to 4 carbon atoms, n has an average value of from 0.5 to 1.4 and a viscosity of from 5 to 40 mm 2 .s -1 at 25° C. and from 0.1 to 30 percent by weight based on the weight of the organopolysiloxane of a solid dispersed in said organopolysiloxane.
Claim 3
Dependent Claim
34 words
The antifoam of claim 1, wherein the organopolysiloxane which has a viscosity of at least 5 to 40 mm 2 .s -1 at 25° C. contains at least one alkoxy group per silicon atom.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |