US3128302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic lubricants
Assignee: Pure Oil Co
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Filing: 1959-06-26
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Granted: 1964-04-07
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Expires: 1979-06-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Martinek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:56
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/34; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A SYNTHETIC MONOMERIC ESTER LUBRICANT CONSISTING ESSENTIALLY OF THE REACTION PRODUCT OF AT LEAST STOICHIOMETRIC AMOUNTS OF (1) COMPLEX POLYNUCLEAR AROMATIC CARBOXYLIC ACIDS DERIVED FROM SOLVENT EXTRACTS OBTAINED IN THE SOLVENT REFINING OF MINERAL LUBRICATING OILS WITH A SOLVENT SELECTIVE FOR AROMATIC COMPOUNDS BY METALATION OF SAID SOLVENT EXTRACTS TO FORM THE ALKALI METAL ADDUCT, CARBONATION OF SAID ADDUCT TO FORM THE CORRESPONDING ALKALI METAL SALT OF THE CARBOXYLIC ACID AND ACIDIFICATION OF SAID SALT TO FORM THE FREE CARBOXYLIC ACID CHARACTERIZED BY BEING COMPLEX POLYNUCLEAR, AROMATIC, ALKYL-AROMATIC COMPOUNDS PREDOMINATING IN CARBON AND HYDROGEN, CONTAINING ABOUT 2.0 TO 4.5 WEIGHT PERCENT OF SULFUR, HAVING A MOLECULAR WEIGHT OF ABOVE ABOUT 320 AND HAVING ABOUT 1.7 TO 3.5 AVERAGE NUMBER OF AROMATIC RINGS PER AROMATIC MOLECULE AND (2) A MONOHYDROXYL-ORGANIC COMPOUND OF THE GROUP CONSISTING OF ALKANOLS OF 1 TO 18 CARBON ATOMS PER MOLECULE, BENZYL ALCOHOL, BENZHYDROL, TRIPHENYLCARBINOL, PHENOL, CRESOLS, XYLENOLS, AND NAPHTHOLS UNDER ESTERIFICATION CONDITIONS AT A TEMPERATURE OF ABOUT 100* TO 250*F.
Claim 2
Dependent Claim
164 words
A SYNTHETIC MONOMERIC ESTER LUBRICANT CONSISTING ESSENTIALLY OF THE REACTION PRODUCT OF AT LEAST STOICHIOMETRIC AMOUNTS OF (1) COMPLEX POLYNUCLEAR AROMATIC CARBOXYLIC ACIDS DERIVED FROM SOLVENT EXTRACTS OBTAINED IN THE SOLVENT REFINING OF MINERAL LUBRICATING OILS WITH A SOLVENT SELECTIVE FOR AROMATIC COMPOUNDS BY METALATION OF SAID SOLVENT EXTRACTS TO FORM THE ALKALI METAL ADDUCT, CARBONATION OF SAID ADDUCT TO FORM THE CORRESPONDING ALKALI METAL SALT OF THE CARBOXYLIC ACID AND ACIDIFICATION OF SAID SALT TO FORM THE FREE CARBOXYLIC ACID CHARACTERIZED BY BEING COMPLEX POLYNUCLEAR, AROMATIC, ALKYL-AROMATIC COMPOUNDS PREDOMINATING IN CARBON AND HYDROGEN, CONTAINING ABOUT 2.0 TO 4.5 WEIGHT PERCENT OF SULFUR, HAVING A MOLECULAR WEIGHT OF ABOVE ABOUT 320 AND HAVING ABOUT 1.7 TO 3.5 AVERAGE NUMBER OF AROMATIC RINGS PER AROMATIC MOLECULE AND (2) A MONOHYDROXYL-ORGANIC COMPOUND OF THE GROUP CONSISTING OF ALKANOLS OF 1 TO 18 CARBON ATOMS PER MOLECULE, BENZYL ALCOHOL, BENZHYDROL, TRIPHENYLCARBINOL, PHENOL, CRESOLS, XYLENOLS, AND NAPHTHOLS UNDER ESTERIFICATION CONDITIONS AT A TEMPERATURE OF ABOUT 100* TO 250*F.
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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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |