Patent US2591890A successfully refreshed from Google Patents.
US2591890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high molecular weight resinous and plastic materials having an aromatic structure
Assignee: Universal Oil Products Co
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Filing: 1948-11-24
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Granted: 1952-04-08
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Expires: 1968-11-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
- 👤 Schmerling Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:50
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR PRODUCING A RESINOUS PRODUCT FROM AN ALKYL AROMATIC HYDROCARBON CONTAINING FROM 2 TO 4 ALKYL GROUPS EACH HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO THE ALPHA-CARBON ATOM, WHICH COMPRISES REACTING SAID HYDROCARBON WITH AT LEAST ONE MOLECULAR PROPORTION OF AN ORGANIC PEROXIDIC COMPOUND PER MOLECULAR PROPORTION OF HYDROCARBON AT A TEMPERATURE OF FROM ABOUT THE DECOMPOSITION TEMPERATURE OF THE PEROXIDE TO A TEMPERATURE ABOUT 100* C. IN EXCESS OF SAID DECOMPOSITION TEMPERATURE AND AT A PRESSURE SUFFICIENT TO MAINTAIN SAID REACTANTS IN SUBSTANTIALLY LIQUID PHASE.
Claim 2
Dependent Claim
89 words
A PROCESS FOR PRODUCING A RESINOUS PRODUCT FROM AN ALKYL AROMATIC HYDROCARBON CONTAINING FROM 2 TO 4 ALKYL GROUPS EACH HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO THE ALPHA-CARBON ATOM, WHICH COMPRISES REACTING SAID HYDROCARBON WITH AT LEAST ONE MOLECULAR PROPORTION OF AN ORGANIC PEROXIDIC COMPOUND PER MOLECULAR PROPORTION OF HYDROCARBON AT A TEMPERATURE OF FROM ABOUT THE DECOMPOSITION TEMPERATURE OF THE PEROXIDE TO A TEMPERATURE ABOUT 100* C. IN EXCESS OF SAID DECOMPOSITION TEMPERATURE AND AT A PRESSURE SUFFICIENT TO MAINTAIN SAID REACTANTS IN SUBSTANTIALLY LIQUID PHASE.
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) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |