US3233986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siloxane-polyoxyalkylene copolymers as anti-foam agents
Assignee: Union Carbide Corp
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Filing: 1962-06-07
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Granted: 1966-02-08
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Expires: 1982-06-07
Abstract
No abstract record available.
Inventors
- 👤 Edward L Morehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:10
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409; C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/28; C10L1/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
AN ANHYDROUS HYDROCARBON COMPOSITION COMPRISING (A) A NON-LUBRICATING, LIQUID HYDROCARBON HAVING A TENDENCY TO FOAM AND (B) FROM 5 PARTS TO 2000 PARTS BY WEIGHT PER MILLION PARTS BY WEIGHT OF SAID LIQUID OF A COPOLYMER THAT IS INSOLUBLE IN SAID LIQUID AND THAT CONSISTS ESSENTIALLY OF (1) AT LEAST ONE SILOXANE BLOCK COMPRISING AT LEAST TWO SILOXANE GROUPS THAT ARE REPRESENTED BY THE FORMULA: (R-)B-SI-O((4-B)/2) WHEREIN R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE MONOVALENT HYDOCARBON GROUPS AND THE DIVALENT HYDROCARBON GROUPS AND B HAS A VALUE FROM 1 TO 3 INCLUSIVE, SAID SILOXANE BLOCK HAVING AT LEAST ONE DIVALENT HYDROCARBON GROUP REPRESENTED BY R, AND (2) AT LEAST ONE POLYOXYALKYLENE BLOCK COMPRISING AT LEAST TWO OXYALKYLENE GROUPS THAT ARE REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
128 words
AN ANHYDROUS HYDROCARBON COMPOSITION COMPRISING (A) A NON-LUBRICATING, LIQUID HYDROCARBON HAVING A TENDENCY TO FOAM AND (B) FROM 5 PARTS TO 2000 PARTS BY WEIGHT PER MILLION PARTS BY WEIGHT OF SAID LIQUID OF A COPOLYMER THAT IS INSOLUBLE IN SAID LIQUID AND THAT CONSISTS ESSENTIALLY OF (1) AT LEAST ONE SILOXANE BLOCK COMPRISING AT LEAST TWO SILOXANE GROUPS THAT ARE REPRESENTED BY THE FORMULA: (R-)B-SI-O((4-B)/2) WHEREIN R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE MONOVALENT HYDOCARBON GROUPS AND THE DIVALENT HYDROCARBON GROUPS AND B HAS A VALUE FROM 1 TO 3 INCLUSIVE, SAID SILOXANE BLOCK HAVING AT LEAST ONE DIVALENT HYDROCARBON GROUP REPRESENTED BY R, AND (2) AT LEAST ONE POLYOXYALKYLENE BLOCK COMPRISING AT LEAST TWO OXYALKYLENE GROUPS THAT ARE REPRESENTED BY THE FORMULA:
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |