Patent US2909539A successfully refreshed from Google Patents.
US2909539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A process for the preparation of high molecular weight condensation products
Assignee: Universal Oil Products Co
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Filing: 1956-02-27
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Granted: 1959-10-20
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Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 Carl B Linn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:37
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/66; C08G63/668
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A PROCESS WHICH COMPRISES CONDENSING OLEIC ACID AND A 1,1-DIPHENYL-1-DESOXY-GLUCITOL AT A TEMPERATURE OF FROM ABOUT -40* TO ABOUT 150*C. IN THE PRESENCE OF A HYDROGEN FLUORIDE CATALYST.
Claim 2
Dependent Claim
28 words
A PROCESS WHICH COMPRISES CONDENSING OLEIC ACID AND A 1,1-DIPHENYL-1-DESOXY-GLUCITOL AT A TEMPERATURE OF FROM ABOUT -40* TO ABOUT 150*C. IN THE PRESENCE OF A HYDROGEN FLUORIDE CATALYST.
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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |