US2687443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical manufacture
Assignee: Millennium Petrochemicals Inc
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Filing: 1952-01-25
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Granted: 1954-08-24
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Expires: 1972-01-25
Abstract
No abstract record available.
Inventors
- 👤 Merton H Douthitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:51
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/005; C07C7/148; C07C7/14833; C07C7/1485
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD FOR REMOVING VOLATILE, WATER-INSOLUBLE ORGANIC BASES AND SUBSTITUTED ORGANIC BASES COMPOUNDS WHICH REACT WITH AQUEOUS CAUSTIC SODA TO FORM VOLATILE WATER-INSOLUBLE ORGANIC BASES AND TARS FROM VOLATILE HYDROCARBONS, LIQUID AT ORDINARY TEMPERATURES AND PRESSURES, CONTAMINATED THEREWITH, COMPRISING THE STEPS OF STEAM DISTILLING THE CONTAMINATED MIXTURE IN THE PRESENCE OF AQUEOUS CAUSTIC SODA, CONDENSING THE VAPORS, FORMING A NON-AQUEOUS LAYER AND AN AQUEOUS LAYER BY SETTLING, SEPARATING THE NONAQUEOUS LAYER AND PASSING IT IN CONTACT WITH A STRONGLY ACIDIC CATION EXCHANGE RESIN.
Claim 2
Independent Claim
83 words
A METHOD FOR REMOVING VOLATILE, WATER-INSOLUBLE ORGANIC BASES AND SUBSTITUTED ORGANIC BASES COMPOUNDS WHICH REACT WITH AQUEOUS CAUSTIC SODA TO FORM VOLATILE WATER-INSOLUBLE ORGANIC BASES AND TARS FROM VOLATILE HYDROCARBONS, LIQUID AT ORDINARY TEMPERATURES AND PRESSURES, CONTAMINATED THEREWITH, COMPRISING THE STEPS OF STEAM DISTILLING THE CONTAMINATED MIXTURE IN THE PRESENCE OF AQUEOUS CAUSTIC SODA, CONDENSING THE VAPORS, FORMING A NON-AQUEOUS LAYER AND AN AQUEOUS LAYER BY SETTLING, SEPARATING THE NONAQUEOUS LAYER AND PASSING IT IN CONTACT WITH A STRONGLY ACIDIC CATION EXCHANGE RESIN.
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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |