US3109036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of dimethylnaphthalenes
Assignee: Sunoco Inc
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Filing: 1961-10-12
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Granted: 1963-10-29
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Expires: 1981-10-12
Abstract
No abstract record available.
Inventors
- 👤 Suld George
- 👤 Archibald P Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:32
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2729; C07C5/2732; C07C5/274; C07C5/2748
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
METHOD OF ISOMERIZING A DIMETHYLNAPHTHALENE TO FORM AT LEAST ONE OTHER DIMETHYLNAPHTHALENE WHICH COMPRISES CONTACTING A DIMETHYLNAPHTHALENE, OTHER THAN THE 1.2-SOMER DISSOLVED IN A SOLVENT THAT IS INERT TO HF AND BF3 WITH HF IN AMOUNT OF AT LEAST 3 MOLES PER MOLE OF DIMETHYLNAPHTHALENE AND WITH BF3 IN AMOUNT OF AT LEAST 0.01 MOLE PER MOLE OF DIMETHYLNAPHTHALENE AT A TEMPERATURE IN THE RANGE OF 0 TO 100* C. WHEREBY METHYL GROUPS SHIFT ONLY BETWEEN ADJACENT ALPHA AND BETA POSITIONS ON THE NAPHTHALENE NUCLEUS, AND SEPARATING HF AND BF3 FROM A DIMETHYLNAPHTHALENE PRODUCT INCLUDING AN ISOMER OF THE ORIGINAL DIMETHYLNAPHTHALENE.
Claim 2
Dependent Claim
101 words
METHOD OF ISOMERIZING A DIMETHYLNAPHTHALENE TO FORM AT LEAST ONE OTHER DIMETHYLNAPHTHALENE WHICH COMPRISES CONTACTING A DIMETHYLNAPHTHALENE, OTHER THAN THE 1.2-SOMER DISSOLVED IN A SOLVENT THAT IS INERT TO HF AND BF3 WITH HF IN AMOUNT OF AT LEAST 3 MOLES PER MOLE OF DIMETHYLNAPHTHALENE AND WITH BF3 IN AMOUNT OF AT LEAST 0.01 MOLE PER MOLE OF DIMETHYLNAPHTHALENE AT A TEMPERATURE IN THE RANGE OF 0 TO 100* C. WHEREBY METHYL GROUPS SHIFT ONLY BETWEEN ADJACENT ALPHA AND BETA POSITIONS ON THE NAPHTHALENE NUCLEUS, AND SEPARATING HF AND BF3 FROM A DIMETHYLNAPHTHALENE PRODUCT INCLUDING AN ISOMER OF THE ORIGINAL DIMETHYLNAPHTHALENE.
References Cited (Backward Citations)
US2425559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |