US2915476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for breaking emulsions of the oil-in-water type using polymeric quaternary ammonium salts
Assignee: Baker Petrolite LLC
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Filing: 1952-12-08
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Granted: 1959-12-01
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Expires: 1972-12-08
Abstract
No abstract record available.
Inventors
- 👤 Shen Kwan-Ting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:16
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR BREAKING EMULSION COMPOSED OF AN OIL DISPERSED IS A NON-OILY CONTINUOUS PHASE IN WHICH THE DISPERSED PHASE IS NOT GREATER THAN 20%, CHARACTERIZED BY SUBJECTING THE EMULSION TO THE ACTION OF A DEMULSIFIER INCLUDING A HYDROPHILE SYNTHETIC PRODUCT; SAID HYDROPHILE SYNTHETIC PRODUCT BEING A POLYMERIC QUATERNARY AMMONIUM SALT WHICH IS A QUATERNIZED POLYMER, CHARACTERIZED BY LINKAGE OF LOWER ALKYL GROUPS AND ANIONS TO NITROGEN ATOMS OF THE POLYMER, OF A VINYL-SUBSTITUTED HETEROCYCLIC COMPOUND WHICH IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF VINYL PYRIDINE AND ALKYLATED VINYL PYRIDINE.
Claim 2
Dependent Claim
92 words
A PROCESS FOR BREAKING EMULSION COMPOSED OF AN OIL DISPERSED IS A NON-OILY CONTINUOUS PHASE IN WHICH THE DISPERSED PHASE IS NOT GREATER THAN 20%, CHARACTERIZED BY SUBJECTING THE EMULSION TO THE ACTION OF A DEMULSIFIER INCLUDING A HYDROPHILE SYNTHETIC PRODUCT; SAID HYDROPHILE SYNTHETIC PRODUCT BEING A POLYMERIC QUATERNARY AMMONIUM SALT WHICH IS A QUATERNIZED POLYMER, CHARACTERIZED BY LINKAGE OF LOWER ALKYL GROUPS AND ANIONS TO NITROGEN ATOMS OF THE POLYMER, OF A VINYL-SUBSTITUTED HETEROCYCLIC COMPOUND WHICH IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF VINYL PYRIDINE AND ALKYLATED VINYL PYRIDINE.
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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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |