Patent US2558812A successfully refreshed from Google Patents.
US2558812A
Expired / Lapsed
US
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Resin and process for its manufacture by condensation of a phenol, an alkyl aromatic hydrocarbon, and a polyenic hydrocarbon
Assignee: Universal Oil Products Co
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Filing: 1947-10-24
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Granted: 1951-07-03
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Expires: 1967-10-24
Abstract
No abstract record available.
Inventors
- 👤 Herman S Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:21
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G8/30; C08G8/02; C08G8/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A PROCESS FOR PRODUCING A SYNTHETIC RESIN WHICH COMPRISES REACTING FROM ABOUT 5 TO ABOUT 25 MOLS PER CENT OF A PHENOL HAVING AT LEAST TWO NUCLEAR HYDROGEN ATOMS, FROM ABOUT 25 TO ABOUT 45 MOLE PER CENT OF AN AROMATIC HYDROCARBON HAVING AT LEAST TWO NUCLEAR HYDROGEN ATOMS AND AN ALKYL GROUP OF NOT MORE THAN TWO CARBON ATOMS, AND FROM ABOUT 50 TO ABOUT 60 MOLE PER CENT OF A CONJUGATED ALIPHATIC DIENE HYDROCARBON IN THE PRESENCE OF AN ACIDIC CATALYST COMPRISING AT LEAST 90% BY WEIGHT OF HYDROGEN FLUORIDE.
References Cited (Backward Citations)
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US2123898A
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US2154192A
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GB516936A
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US2378436A
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US2353282A
Cited
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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) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |