Patent US2935538A successfully refreshed from Google Patents.
US2935538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of methylcyclopentadiene dimer
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1958-07-28
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Granted: 1960-05-03
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Expires: 1978-07-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Hill
- 👤 Donald W Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:41
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/28; C07C13/32; C07C13/54; C07C13/605; C07C13/61; C07C7/00; C07C7/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD FOR MAXIMIZING THE PRODUCTION AND RECOVERY OF DI-METHYLCYCLOPENTADIENE FROM A STREAM CONTAINING METHYLCYCLOPENTADIENE AND LOWER AND HIGHER BOILING COMPOUNDS WHICH COMPRISES SEPARATING SAID STREAM INTO A FIRST FRACTION CONTAINING MOST OF THE METHYLCYCLOPENTADIENE AND OTHER C6 AND HIGHER HYDROCARBONS AND A SECOND FRACTION CONTAINING THE REMAINING METHYLCYCLOPENTADIENE WITH OTHER COMPOUNDS BOILING IN AND BELOW THE C6 HYDROCARBON BOILING RANGE, SOAKING SAID FIRST FRACTION TO CONVERT THE METHYLCYCLOPENTADIENE TO DI-METHYLCYCLOPENTADIENE, CONTACTING SAID SECOND FRACTION WITH DI-
Claim 2
Independent Claim
77 words
A METHOD FOR MAXIMIZING THE PRODUCTION AND RECOVERY OF DI-METHYLCYCLOPENTADIENE FROM A STREAM CONTAINING METHYLCYCLOPENTADIENE AND LOWER AND HIGHER BOILING COMPOUNDS WHICH COMPRISES SEPARATING SAID STREAM INTO A FIRST FRACTION CONTAINING MOST OF THE METHYLCYCLOPENTADIENE AND OTHER C6 AND HIGHER HYDROCARBONS AND A SECOND FRACTION CONTAINING THE REMAINING METHYLCYCLOPENTADIENE WITH OTHER COMPOUNDS BOILING IN AND BELOW THE C6 HYDROCARBON BOILING RANGE, SOAKING SAID FIRST FRACTION TO CONVERT THE METHYLCYCLOPENTADIENE TO DI-METHYLCYCLOPENTADIENE, CONTACTING SAID SECOND FRACTION WITH DI-
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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |