US2984550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilization of petroleum oils and compositions therefor
Assignee: ChampionX LLC
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Filing: 1956-09-06
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Granted: 1961-05-16
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Expires: 1976-09-06
Abstract
No abstract record available.
Inventors
- 👤 Walter M Chamot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:08
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/234; C10L1/238
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A REFINED PETROLEUM OIL DISTILLATE FRACTION HAVING A BOILING POINT IN EXCESS OF 380*F. CONTAINING A SMALL AMOUNT SUFFICIENT TO STABILIZE THE COLOR THEREOF AGAINST DARKENING DURING STORAGE OF A POLYMERIC CONDENSATION PRODUCT OBTAINED BY THE REACTION OF A PHENOL HAVING TWO REACTIVE RING POSITIONS, A LOWER ALIPHATIC ALDEHYDE HAVING 1-2 CARBONS, AND A POLYAMINE HAVING A REACTIVE HYDROGEN ATOM ON AT LEAST TWO AMINO NITROGENS, SAID CONDENSATION PRODUCT BEING FORMED BY CONDENSING THE FOREGOING REACTANTS AT A MOLAR RATIO OF 2 MOLS OF SAID ALDEHYDE PER MOL OF SAID PHENOL AND A MOLAR RATIO OF PHENOL TO POLYAMINE IN THE RANGE OF 1:1 TO 2:1, RESPECTIVELY, AT AN ELEVATED REACTION TEMPERATURE SUFFICIENT TO FORM A POLYMERIZED CONDENSATION PRODUCT, SAID POLYMERIZED CONDENSATION PRODUCT BEING ESSENTIALLY FREE OF CROSS-LINKING AND SOLUBLE IN SAID DISTILLATE FRACTION.
Claim 2
Dependent Claim
134 words
A REFINED PETROLEUM OIL DISTILLATE FRACTION HAVING A BOILING POINT IN EXCESS OF 380*F. CONTAINING A SMALL AMOUNT SUFFICIENT TO STABILIZE THE COLOR THEREOF AGAINST DARKENING DURING STORAGE OF A POLYMERIC CONDENSATION PRODUCT OBTAINED BY THE REACTION OF A PHENOL HAVING TWO REACTIVE RING POSITIONS, A LOWER ALIPHATIC ALDEHYDE HAVING 1-2 CARBONS, AND A POLYAMINE HAVING A REACTIVE HYDROGEN ATOM ON AT LEAST TWO AMINO NITROGENS, SAID CONDENSATION PRODUCT BEING FORMED BY CONDENSING THE FOREGOING REACTANTS AT A MOLAR RATIO OF 2 MOLS OF SAID ALDEHYDE PER MOL OF SAID PHENOL AND A MOLAR RATIO OF PHENOL TO POLYAMINE IN THE RANGE OF 1:1 TO 2:1, RESPECTIVELY, AT AN ELEVATED REACTION TEMPERATURE SUFFICIENT TO FORM A POLYMERIZED CONDENSATION PRODUCT, SAID POLYMERIZED CONDENSATION PRODUCT BEING ESSENTIALLY FREE OF CROSS-LINKING AND SOLUBLE IN SAID DISTILLATE FRACTION.
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) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |