Patent US2900350A successfully refreshed from Google Patents.
US2900350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breaking water-in-oil emulsions
Assignee: Visco Products Co
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Filing: 1956-02-27
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Granted: 1959-08-18
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Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:57
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS OF BREAKING WATER-IN-OIL EMULSIONS WHICH COMPRISES TREATING SUCH EMULSONS WITH AN ADDITION PRODUCT OF A COMPOUND FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES AND AN ALIPHATIC HYDROXY COMPOUND CONTAINING A PRIMARY HYDROXYL GROUP, SAID ADDITION PRODUCT BEING FURTHER CHARACTERIZED BY HAVING A STRUCTURE CONTAINING AT LEAST ONE INTERIORLY LOCATED OXYMETHYLENE GROUP TO WHICH IS LINEARLY ATTACHED AT LEAST ONE LARGER POLYOXYALKYLENE CHAINS, N-HYDROCARBON CHAINS, ALIPHATIC OXYHYDROCARBON CHAINS, N-HYDROCARBON CHAINS AND MIXTURE OF SAID CHAINS IN THE SAME MOLECULE, WITH THE FURTHER PROVISO THAT THE AVERAGE MOLECULAR WEIGHT ATTRIBUTABLE TO OXYALKYLENE GROUPS IN SAID ADDITION PRODUCT IS AT LEAST 1000 AND THE COMBINED WEIGHT OF OXYALKYLENE GROUPS FROM THE CLASS CONSISTING OF OXYMEHTYLENE AND OXYETHYLENE DOES NOT EXCEED THE COMBINED WEIGHT OF THE REMAINDER OF THE MOLECULE BY A WEIGHT RATTIO GREATER THAN 4:1
Claim 2
Dependent Claim
136 words
A PROCESS OF BREAKING WATER-IN-OIL EMULSIONS WHICH COMPRISES TREATING SUCH EMULSONS WITH AN ADDITION PRODUCT OF A COMPOUND FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES AND AN ALIPHATIC HYDROXY COMPOUND CONTAINING A PRIMARY HYDROXYL GROUP, SAID ADDITION PRODUCT BEING FURTHER CHARACTERIZED BY HAVING A STRUCTURE CONTAINING AT LEAST ONE INTERIORLY LOCATED OXYMETHYLENE GROUP TO WHICH IS LINEARLY ATTACHED AT LEAST ONE LARGER POLYOXYALKYLENE CHAINS, N-HYDROCARBON CHAINS, ALIPHATIC OXYHYDROCARBON CHAINS, N-HYDROCARBON CHAINS AND MIXTURE OF SAID CHAINS IN THE SAME MOLECULE, WITH THE FURTHER PROVISO THAT THE AVERAGE MOLECULAR WEIGHT ATTRIBUTABLE TO OXYALKYLENE GROUPS IN SAID ADDITION PRODUCT IS AT LEAST 1000 AND THE COMBINED WEIGHT OF OXYALKYLENE GROUPS FROM THE CLASS CONSISTING OF OXYMEHTYLENE AND OXYETHYLENE DOES NOT EXCEED THE COMBINED WEIGHT OF THE REMAINDER OF THE MOLECULE BY A WEIGHT RATTIO GREATER THAN 4:1
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |