US2720543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of imparting odor-stability to glycol thioether by acidifying and subsequently neutralizing or partially neutralizing
Assignee: Phillips Petroleum Co
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Filing: 1951-01-31
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Granted: 1955-10-11
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Expires: 1971-01-31
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
- 👤 Rector P Louthan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:59
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/14; C07C319/26; C07C319/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS WHICH COMPRISES ACIDIFYING A GLYCOL THIOETHER TO A PH IN THE RANGE 0.7 TO 3.0, HEATING THE ACIDIFIED THIOETHER FOR 10 TO 60 MINUTES AT A TEMPERATURE IN THE RANGE OF 200* TO 280* F., NEUTRALIZING TO A PH IN THE RANGE OF 4 TO 8, STRIPPING THE NEUTRALIZED THIOETHER AT A TEMPERATURE EQUIVALENT TO 260* TO 280* F. AT 760 MM. HG, AND RECOVERING A GLYCOL THIOETHER HAVING SUBSTANTIALLY INCREASED STABILITY AND A SUBSTANTIALLY DECREASED TENDENCY TOWARD ODOR DEVELOPMENT.
Claim 2
Dependent Claim
82 words
A PROCESS WHICH COMPRISES ACIDIFYING A GLYCOL THIOETHER TO A PH IN THE RANGE 0.7 TO 3.0, HEATING THE ACIDIFIED THIOETHER FOR 10 TO 60 MINUTES AT A TEMPERATURE IN THE RANGE OF 200* TO 280* F., NEUTRALIZING TO A PH IN THE RANGE OF 4 TO 8, STRIPPING THE NEUTRALIZED THIOETHER AT A TEMPERATURE EQUIVALENT TO 260* TO 280* F. AT 760 MM. HG, AND RECOVERING A GLYCOL THIOETHER HAVING SUBSTANTIALLY INCREASED STABILITY AND A SUBSTANTIALLY DECREASED TENDENCY TOWARD ODOR DEVELOPMENT.
References Cited (Backward Citations)
US2494610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |