Patent US4321631A successfully refreshed from Google Patents.
Patent US3395190A successfully refreshed from Google Patents.
US3395190A
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Purification of trans-1, 2-bis (3-cyclo-hexen-1-yl) ethylene
Assignee: Phillips Petroleum Co
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Filing: 1966-11-07
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Granted: 1968-07-30
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Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 Donald C Tabler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:18
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/28; C07C6/00; C07C6/02; C07C6/04; C07C7/00; C07C7/14; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR PURIFYING CRUDE TRANS-1,2-BIS(3-CYCLOHEXEN-1-YL)ETHYLENE (BCE) FROM MIXTURES WITH ISOMERS THEREOF WHICH COMPRISES THE STEPS OF: (1) DISSOLVING A SUFFICIENT AMOUNT OF AT LEAST ONE SOLVENT OF THE GROUP METHYL ETHYL KETONE AND METHYL ISOBUTYL KETONE IN SAID BCE TO EFFECT SUBSTANTIAL CRYSTAL FORMATION IN STEP (2); (2) CHILLING THE SOLUTION FORMED IN STEP (1) SO AS TO FREEZE A SUBSTANTIAL PORTION OF SAID BCE THEREIN; AND (3) SEPARATELY RECOVERING THE CRYSTALS OF STEP (2) CONTAINING A HIGHER CONCENTRATION OF SAID BCE THAN ITS CONCENTRATION IN SAID CRUDE BCE.
Claim 2
Dependent Claim
90 words
A PROCESS FOR PURIFYING CRUDE TRANS-1,2-BIS(3-CYCLOHEXEN-1-YL)ETHYLENE (BCE) FROM MIXTURES WITH ISOMERS THEREOF WHICH COMPRISES THE STEPS OF: (1) DISSOLVING A SUFFICIENT AMOUNT OF AT LEAST ONE SOLVENT OF THE GROUP METHYL ETHYL KETONE AND METHYL ISOBUTYL KETONE IN SAID BCE TO EFFECT SUBSTANTIAL CRYSTAL FORMATION IN STEP (2); (2) CHILLING THE SOLUTION FORMED IN STEP (1) SO AS TO FREEZE A SUBSTANTIAL PORTION OF SAID BCE THEREIN; AND (3) SEPARATELY RECOVERING THE CRYSTALS OF STEP (2) CONTAINING A HIGHER CONCENTRATION OF SAID BCE THAN ITS CONCENTRATION IN SAID CRUDE BCE.
References Cited (Backward Citations)
US3342884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |