Patent US5379150A successfully refreshed from Google Patents.
Patent US3284535A successfully refreshed from Google Patents.
US3284535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 3-methyl-1-butene
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1963-05-10
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Granted: 1966-11-08
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Expires: 1983-05-10
Abstract
No abstract record available.
Inventors
- 👤 William R Edwards
- 👤 Robert D Wesselhoft
- 👤 Willard N Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:46
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C11/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A METHOD OF OPTIMIZING THE PRODUCTION OF HIGH PURITY 3-METHYL-1-BUTENE FROM CATALYSTIC NAPHTHA WHICH COMPRISES FRACTIONATING SAID CATALYTIC NAPHTHA TO OBTAIN A HEART CUT CONSISTING ESSENTIALLY OF PENTENE-1, 2-METHYL-1BUTENE, PENTENE-2, N-PENTANE, AND 2-METHYL-2-BUTENE, EACH OF WHICH IS A PRECURSOR OF 3-METHYL-1-BUTENE, CONTACTING SAID HEART CUT IN AN ISOMERIZATION ZONE WITH AN ACIDIC CRACKING CATALYST UNDER ISOMERIZAITION CONDITIONS TO OBTAIN AN ISOMERIZED PRODUCT STREAM CONTAINING MORE 3-METHYL-1-BUTENE THAN WAS CONTAINED IN SAID HEAT CUT, FRACTIONATING SAID ISOMERIZED PRODUCT STREAM TO OBTAIN A 3-METHYL-1-BUTENE STREAM AND A RECYCLE STREAM, AND RECYCLING AT LEAST A PORTION OF SAID RECYCLE STREAM TO SAID ISOMERIZATION ZONE.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |