US2856389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petroleum resins containing indene
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1953-07-22
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Granted: 1958-10-14
•
Expires: 1973-07-22
Abstract
No abstract record available.
Inventors
- 👤 James V Fusco
- 👤 Stanley B Mirviss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:21
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A PROCESS FOR PREPARING IMPROVED SOLID PETROLEUM RESINS WHICH COMPRISES POLYMERIZING A STEAM-CRACKED PETROLEUM FRACTION BOILING IN THE RANGE OF 20* TO 170* C. OVER A FRIEDEL-CRAFTS METAL HALIDE CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING A REACTIVE HYDROCARBON FRACTION CONSISTING ESSENTIALLY OF INDENES TO SAID PETROLEUM FRACTION PRIOR TO THE POLYMERIZATION REACTION SUCH THAT AT LEAST 5WT. PERCENT OF INDENES, BASED ON THE TOTAL FEED MIXTURE, ARE PRESENT.
Claim 2
Dependent Claim
69 words
IN A PROCESS FOR PREPARING IMPROVED SOLID PETROLEUM RESINS WHICH COMPRISES POLYMERIZING A STEAM-CRACKED PETROLEUM FRACTION BOILING IN THE RANGE OF 20* TO 170* C. OVER A FRIEDEL-CRAFTS METAL HALIDE CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING A REACTIVE HYDROCARBON FRACTION CONSISTING ESSENTIALLY OF INDENES TO SAID PETROLEUM FRACTION PRIOR TO THE POLYMERIZATION REACTION SUCH THAT AT LEAST 5WT. PERCENT OF INDENES, BASED ON THE TOTAL FEED MIXTURE, ARE PRESENT.
References Cited (Backward Citations)
US1263813A
Cited
US2193792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |