US2991297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing synthetic lubricants
Assignee: Celanese Corp
•
Filing: 1958-07-02
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Granted: 1961-07-04
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Expires: 1978-07-02
Abstract
No abstract record available.
Inventors
- 👤 Stone D Cooley
- 👤 Slovinsky Manuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:31
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/02; C07C69/22; C07C69/30; C10; C10M; C10M169/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
METHOD OF PREPARING A TRIALKANOIC ACID ESTER OF TRIMETHYLOLPROPANE HAVING THREE METHYLOL GROUPS ON A QUATERNARY CARBON ATOM, HAVING ALKANOIC ACID CHAIN LENGTHS AVERAGING BETWEEN 5 AND 9 CARBON ATOMS, WHICH COMPRISES REACTING AN ALKANOIC ACID HAVING SAID AVERAGE CHAIN LENGTH WITH SAID TRIMETHYLOLPROPANE IN A REACTION MIXTURE CONTAINING NO OTHER CARBOXYLIC ACIDS AND CONTAINING NO ACIDIC MATERIAL HAVING A DISSOCIATION CONSTANT HIGHER THAN THAT OF ACETIC ACID.
Claim 2
Dependent Claim
68 words
METHOD OF PREPARING A TRIALKANOIC ACID ESTER OF TRIMETHYLOLPROPANE HAVING THREE METHYLOL GROUPS ON A QUATERNARY CARBON ATOM, HAVING ALKANOIC ACID CHAIN LENGTHS AVERAGING BETWEEN 5 AND 9 CARBON ATOMS, WHICH COMPRISES REACTING AN ALKANOIC ACID HAVING SAID AVERAGE CHAIN LENGTH WITH SAID TRIMETHYLOLPROPANE IN A REACTION MIXTURE CONTAINING NO OTHER CARBOXYLIC ACIDS AND CONTAINING NO ACIDIC MATERIAL HAVING A DISSOCIATION CONSTANT HIGHER THAN THAT OF ACETIC ACID.
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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |