US3639366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petroleum resins
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-06-11
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Granted: 1972-02-01
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Expires: 1988-06-11
Abstract
Abstract PETROLEUM RESINS HAVING LOW COLOR AND EXCELLENT COLOR STABILITY ARE PREPARED BY POLYMERIZING A LIGHT STEAM CRACKED NAPHTHA HAVING A FINAL BOILING POINT BELOW 70* C. IN A HOMOGENEOUS MEDIUM IN THE PRESENCE OF A LIQUID TERNARY CATALYST COMPRISING SUBSTANTIALLY EQUIMOLAR QUANTITIES OF AN ALUMINUM HALIDE, A HYDROGEN HALIDE, AND AN AROMATIC HYDROCARBON AD CATALYTICALLY HYDROGENATING THE RESIN RESULTIG THEREFROM AT ELEVATED TEMPERATURE AND PRESSURE.
Inventors
- 👤 Jacques Broca
- 👤 Jean-Paul Loree
- 👤 Schatz Ralph Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:52
CPC Classifications
C; C08; C08G; C08G61/00; B; B60; B60L; B60L7/00; B60L7/003; C08F; C08F240/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |