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Patent US2981693A successfully refreshed from Google Patents.
US2981693A
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Apparatus and method of controlling foam
Assignee: Wyeth Holdings LLC
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Filing: 1958-01-17
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Granted: 1961-04-25
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Expires: 1978-01-17
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Browne
- 👤 Charles R Sofield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:53
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10S; Y10S159/00; Y10S159/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
APPARATUS FOR THE CONTROL OF FOAM OVER FOAM-PRODUCING LIQUID WHICH COMPRISES A VESSEL ADAPTED TO HOLD A FOAM-PRODUCING LIQUID, A LIQUID ABSORPTIVE DEFOAMING ELEMENT ADAPTED TO HOLD A QUANTITY OF AN ANTIFOAM AGENT AND TO DIFFUSE SAID ANTIFOAM AGENT INTO SAID FOAM ONLY UPON CONTACT OF SAID FOAM WITH SAID ELEMENT, SAID ELEMENT BEING SUSPENDED A SHORT DISTANCE OVER AND LIQUID IN SUCH MANNER AS TO MAKE CONTACT AT THE LOWER PORTION THEREOF WITH FOAM AS IT FORMS AND RISES TO THE LEVEL OF THE LOWER PORTION OF SAID ELEMENT AND MEANS TO SUPPLY ADDITIONAL ANTIFOAM AGENT TO SAID ELEMENT.
Claim 2
Dependent Claim
100 words
APPARATUS FOR THE CONTROL OF FOAM OVER FOAM-PRODUCING LIQUID WHICH COMPRISES A VESSEL ADAPTED TO HOLD A FOAM-PRODUCING LIQUID, A LIQUID ABSORPTIVE DEFOAMING ELEMENT ADAPTED TO HOLD A QUANTITY OF AN ANTIFOAM AGENT AND TO DIFFUSE SAID ANTIFOAM AGENT INTO SAID FOAM ONLY UPON CONTACT OF SAID FOAM WITH SAID ELEMENT, SAID ELEMENT BEING SUSPENDED A SHORT DISTANCE OVER AND LIQUID IN SUCH MANNER AS TO MAKE CONTACT AT THE LOWER PORTION THEREOF WITH FOAM AS IT FORMS AND RISES TO THE LEVEL OF THE LOWER PORTION OF SAID ELEMENT AND MEANS TO SUPPLY ADDITIONAL ANTIFOAM AGENT TO SAID ELEMENT.
References Cited (Backward Citations)
DE448846C
Cited
US1792963A
Cited
GB349288A
Cited
US1916614A
Cited
US1984789A
Cited
US2017368A
Cited
FR987520A
Cited
GB655885A
Cited
US2649758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |