US2968674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hydrolyzing dibasic acid esters while inhibiting the formation of color materials
Assignee: Gulf Research and Development Co
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Filing: 1957-09-25
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Granted: 1961-01-17
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Expires: 1977-09-25
Abstract
No abstract record available.
Inventors
- 👤 Norman W Franke
- 👤 Edgar I Crowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:15
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A PROCESS WHEREIN A SATURATED ALIPHATIC HYDROCARBON IS OXIDIZED WITH A GAS CONTAINING FREE OXYGEN TO OBTAIN A PRODUCT HAVING A SAPONIFICATION NUMBER FROM ABOUT 100 TO 450 AND SAID PRODUCT IS THEREAFTER SUBJECTED TO FURTHER OXIDATION AT AN ELEVATED TEMPERATURE WITH NITRIC ACID HAVING A CONCENTRATION ABOVE ABOUT 50 PERCENT TO OBTAIN DIBASIC ACIDS HAVING 3 TO 12 CARBON ATOMS, SAID DIBASIC ACIDS ARE REACTED WITH AN ALIPHATIC MONOHYDRIC ALCOHOL HAVING ONE TO 20 CARBON ATOMS TO OBTAIN THE CORRESPONDING ESTERS AND SAID ESTERS ARE THEREAFTER HYDROLYZED TO OBTAILN THE CORRESPONDING DIBASIC ACIDS, SAID HYDROLYSIS BEING ACCOMPANIED BY THE FORMATION OF UNDERSIRABLE COLOR MATERIALS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID HYDROLYSIS IN AN INERT ATMOSPHERE, WHEREBY THE FORMATION OF SAID UNDERSIRABLE COLOR MATERIALS IS INHIBITED.
Claim 2
Dependent Claim
127 words
IN A PROCESS WHEREIN A SATURATED ALIPHATIC HYDROCARBON IS OXIDIZED WITH A GAS CONTAINING FREE OXYGEN TO OBTAIN A PRODUCT HAVING A SAPONIFICATION NUMBER FROM ABOUT 100 TO 450 AND SAID PRODUCT IS THEREAFTER SUBJECTED TO FURTHER OXIDATION AT AN ELEVATED TEMPERATURE WITH NITRIC ACID HAVING A CONCENTRATION ABOVE ABOUT 50 PERCENT TO OBTAIN DIBASIC ACIDS HAVING 3 TO 12 CARBON ATOMS, SAID DIBASIC ACIDS ARE REACTED WITH AN ALIPHATIC MONOHYDRIC ALCOHOL HAVING ONE TO 20 CARBON ATOMS TO OBTAIN THE CORRESPONDING ESTERS AND SAID ESTERS ARE THEREAFTER HYDROLYZED TO OBTAILN THE CORRESPONDING DIBASIC ACIDS, SAID HYDROLYSIS BEING ACCOMPANIED BY THE FORMATION OF UNDERSIRABLE COLOR MATERIALS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID HYDROLYSIS IN AN INERT ATMOSPHERE, WHEREBY THE FORMATION OF SAID UNDERSIRABLE COLOR MATERIALS IS INHIBITED.
References Cited (Backward Citations)
US1931859A
Cited
US2839571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |