Patent CH59350A successfully refreshed from Google Patents.
US3274292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyesters prepared from complex sulfur-containing carboxylic acids derived from petroleum
Assignee: Union Oil Company of California
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Filing: 1962-12-26
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Granted: 1966-09-20
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Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Louis A Joo
- 👤 Theodore H Szawlowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:40
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
THE REACTION PRODUCT OF A PREDOMINANTLY MONOCARBOXYLIC ACID FRACTION OF MIXED MONO-, DI- AND POLYCARBOXYLIC ACIDS DERIVED FROM SOLVENT EXTRACTS OBTAINED IN THE SOLVENT EXTRACTION OF MINERAL LUBRICATION OILS USING 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 ALKALI METAL SALT OF THE CORRESPONDING CARBOXYLIC ACIDS FRACTIONATION OF SAID SALT TO RECOVER THE PREDOMINANTLY MONOCARBOXYLIC ACID SALT AND ACIDIFICATION OF SAID SALT FRACTION TO FORM THE FREE MONOCARBOXYLIC ACID FRACTION, SAID MONOCARBOXYLIC ACID FRACTION BEING CHARACTERIZED BY AN AVERAGE MOLECULAR WEIGHT OF ABOUT 300 TO 750, AND CONTAINING ABOUT 1.0 TO 4.5 WEIGHT PERCENT OF COMBINED SULFUR IN HETEROCYCLIC FORM AND AN AVERAGE OF 1.7 TO 5.0 AROMATIC RINGS PER MEANS AROMATIC MOLECULE, AND A POLYOL AND AN UNSATURATED DIBASIS ACID UNDER ESTERIFICATION CONDITIONS AT A TEMPERATURE OF ABOUT 350* TO 500*F.
Claim 2
Dependent Claim
149 words
THE REACTION PRODUCT OF A PREDOMINANTLY MONOCARBOXYLIC ACID FRACTION OF MIXED MONO-, DI- AND POLYCARBOXYLIC ACIDS DERIVED FROM SOLVENT EXTRACTS OBTAINED IN THE SOLVENT EXTRACTION OF MINERAL LUBRICATION OILS USING 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 ALKALI METAL SALT OF THE CORRESPONDING CARBOXYLIC ACIDS FRACTIONATION OF SAID SALT TO RECOVER THE PREDOMINANTLY MONOCARBOXYLIC ACID SALT AND ACIDIFICATION OF SAID SALT FRACTION TO FORM THE FREE MONOCARBOXYLIC ACID FRACTION, SAID MONOCARBOXYLIC ACID FRACTION BEING CHARACTERIZED BY AN AVERAGE MOLECULAR WEIGHT OF ABOUT 300 TO 750, AND CONTAINING ABOUT 1.0 TO 4.5 WEIGHT PERCENT OF COMBINED SULFUR IN HETEROCYCLIC FORM AND AN AVERAGE OF 1.7 TO 5.0 AROMATIC RINGS PER MEANS AROMATIC MOLECULE, AND A POLYOL AND AN UNSATURATED DIBASIS ACID UNDER ESTERIFICATION CONDITIONS AT A TEMPERATURE OF ABOUT 350* TO 500*F.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |