Patent US2729688A successfully refreshed from Google Patents.
US2729688A
Expired / Lapsed
US
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Production of naphthalene
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-10-26
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Granted: 1956-01-03
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Expires: 1973-10-26
Abstract
No abstract record available.
Inventors
- 👤 Jr James A Anderson
- 👤 Edward J Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:07
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/367
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD FOR PRODUCING NAPHTHALENE WHICH COMPRISES SUBJECTING A TETRALIN-CONTAINING HYDROCARBON FRACTION BOILING IN THE RANGE FROM ABOUT 350* TO ABOUT 650* F. IN A REACTION ZONE FREE OF ACTIVE CATALYTIC MATERIAL TO A TEMPERATURE IN THE RANGE BETWEEN ABOUT 1200* AND ABOUT 1400* F. AT A PRESSUR IN THE RANGE BETWEEN ABOUT 400 AND ABOUT 1000 POUNDS PER SQUARE INCH GAUGE FOR A TIME IN THE RANGE BETWEEN ABOUT 2 AND ABOUT 120 SECONDS IN THE PRESENCE OF HYDROGEN IN AN AMOUNT IN THE RANGE BETWEEN 4000 AND 10,000 STANDARD CUBIC FEET PER BARREL OF SAID HYDROCARBON FRACTION TO PRODUCE A PRODUCT CONTAINING NAPHTHALENE, AND RECOVERING SAID PRODUCT.
Claim 2
Independent Claim
109 words
A METHOD FOR PRODUCING NAPHTHALENE WHICH COMPRISES SUBJECTING A TETRALIN-CONTAINING HYDROCARBON FRACTION BOILING IN THE RANGE FROM ABOUT 350* TO ABOUT 650* F. IN A REACTION ZONE FREE OF ACTIVE CATALYTIC MATERIAL TO A TEMPERATURE IN THE RANGE BETWEEN ABOUT 1200* AND ABOUT 1400* F. AT A PRESSUR IN THE RANGE BETWEEN ABOUT 400 AND ABOUT 1000 POUNDS PER SQUARE INCH GAUGE FOR A TIME IN THE RANGE BETWEEN ABOUT 2 AND ABOUT 120 SECONDS IN THE PRESENCE OF HYDROGEN IN AN AMOUNT IN THE RANGE BETWEEN 4000 AND 10,000 STANDARD CUBIC FEET PER BARREL OF SAID HYDROCARBON FRACTION TO PRODUCE A PRODUCT CONTAINING NAPHTHALENE, AND RECOVERING SAID PRODUCT.
References Cited (Backward Citations)
GB281298A
Cited
US2475977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |