US2862914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing aromatic hydrocarbon resin
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-05-02
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Granted: 1958-12-02
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Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Robert F Leary
- 👤 James V Fusco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:52
CPC Classifications
C; C08; C08F; C08F240/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
A PROCESS FOR PREPARING A HIGHLY AROMATIC HYDROCARBON RESIN WHICH COMPRISES: RECOVERING THE LIQUID POLYMER BY-PRODUCT FROM THE FRIEDEL-CRAFTS POLYMERIZATION OF A STEAM-CRACKED PETROLEUM FRACTION BOILING BETWEEN ABOUT 20*C. AND 140*C., SAID LIQUID POLYMER BOILING BETWEEN ABOUT 350* AND 800*F. AND CONTAINING ABOUT 20 TO 50 WT. PERCENT AROMATIC HYDROCARBONS; STEAM-CRACKING SAID LIQUID POLYMER AT CONDITIONS ADAPTED TO YIELD A CRACKED FRACTION BOILING BETWEEN ABOUT 250* AND 500*F., RECOVERING SAID CRACKED FRACTION BOILING BETWEEN ABOUT 250* AND 500*F.; CONTACTING SAID CRACKED FRACTION WITH A FRIEDEL-CRAFTS POLYMERIZATION CATALYST AT A TEMPERATURE BETWEEN ABOUT -50*C. AND +200*C.; AND RECOVERING THE RESULTING HIGHLY AROMATIC RESIN.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |