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Patent US2513252A successfully refreshed from Google Patents.
US2513252A
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Distillation of diolefins
Assignee: Standard Oil Development Co
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Filing: 1946-05-31
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Granted: 1950-06-27
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Expires: 1966-05-31
Abstract
No abstract record available.
Inventors
- 👤 Robertson Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:01
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD FOR PRODUCING DIOLEFINS OF A PURITY IN EXCESS OF 98% WHICH COMPRISES DISTILLING A CONTAIMINATED DIOLEFIN STREAM IN THE PRESENCE OF AN AMOUNT IN THE RANGE BETWEEN 1% AND 4% BY VOLUME OF THE CONTAIMINATED DIOLEFIN OF A HIGH BOILING PETROLEUM GAS OIL HAVING SUBSTANTIALLY NO VAPOR PRESSURE AT THE TEMPERATURE OF DISTILLATION.
Claim 2
Independent Claim
55 words
A METHOD FOR PRODUCING DIOLEFINS OF A PURITY IN EXCESS OF 98% WHICH COMPRISES DISTILLING A CONTAIMINATED DIOLEFIN STREAM IN THE PRESENCE OF AN AMOUNT IN THE RANGE BETWEEN 1% AND 4% BY VOLUME OF THE CONTAIMINATED DIOLEFIN OF A HIGH BOILING PETROLEUM GAS OIL HAVING SUBSTANTIALLY NO VAPOR PRESSURE AT THE TEMPERATURE OF DISTILLATION.
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) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |