Patent US2052635A successfully refreshed from Google Patents.
Patent US3350310A successfully refreshed from Google Patents.
US3350310A
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Preparation of overbased calcium alkylphenate sulfides
Assignee: Mobil Oil AS
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Filing: 1965-10-21
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Granted: 1967-10-31
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Richard S Herd
- 👤 Jr Emil Koft
- 👤 Ferdinand P Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:14
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/22; C10M2207/00; C10M2207/28; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A METHOD OF PRODUCING AN OVERBASED SULFURIZED CALCIUM ALKYLPHENATE COMPRISING (1) REACTING AN ANHYDROUS MIXTURE OF CALCIUM OXIDE, METHANOL AND CARBON DIOXIDE TOGETHER AT A TEMPERATURE IN THE RANGE OF 10* TO 30*C. WHEREIN THE RATIO OF MOLES OF CARBON DIOXIDE PER MOLE OF CALCIUM IS IN THE RANGE OF 0.4 TO 0.8, (2) REACTING THE PRODUCT OF STEP (1) WITH AN ALKYPHENOL SULFIDE PRODUCED FROM A PHENOL AND A SULFUR REAGENT AT A MOLE RATIO IN THE RANGE OF 4:4 TO 2:4 OF PHENOL TO SULFUR REAGENT, WHEREIN THE ALKYL GROUP CONTAINS FROM 4 TO 30 CARBON ATOMS, AND (3) HEATING THE SAID REACTION MIXTURE AT 125* TO 175*C. TO REMOVE THE SAID METHANOL BY DISTILLATION.
Claim 2
Independent Claim
117 words
A METHOD OF PRODUCING AN OVERBASED SULFURIZED CALCIUM ALKYLPHENATE COMPRISING (1) REACTING AN ANHYDROUS MIXTURE OF CALCIUM OXIDE, METHANOL AND CARBON DIOXIDE TOGETHER AT A TEMPERATURE IN THE RANGE OF 10* TO 30*C. WHEREIN THE RATIO OF MOLES OF CARBON DIOXIDE PER MOLE OF CALCIUM IS IN THE RANGE OF 0.4 TO 0.8, (2) REACTING THE PRODUCT OF STEP (1) WITH AN ALKYPHENOL SULFIDE PRODUCED FROM A PHENOL AND A SULFUR REAGENT AT A MOLE RATIO IN THE RANGE OF 4:4 TO 2:4 OF PHENOL TO SULFUR REAGENT, WHEREIN THE ALKYL GROUP CONTAINS FROM 4 TO 30 CARBON ATOMS, AND (3) HEATING THE SAID REACTION MIXTURE AT 125* TO 175*C. TO REMOVE THE SAID METHANOL BY DISTILLATION.
References Cited (Backward Citations)
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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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |