US2555940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation and purification of unsaturated hydrocarbons
Assignee: Phillips Petroleum Co
•
Filing: 1948-08-26
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Granted: 1951-06-05
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Expires: 1968-08-26
Abstract
No abstract record available.
Inventors
- 👤 Russell K Simms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:41
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C7/00; C07C7/148; C07C7/14875; C07C7/14883
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR PURIFYING A HYDROCARBON FRACTION COMPRISING A MONO-OLEFIN AND CONTAINING A CONJUGATED MONOMERIC DIOLEFIN AS AN IMPURITY, COMPRISING THE STEPS OF CONTACTING SUCH A HYDROCARBON FRACTION WITH POP CORN POLYMER, WHEREBY SAID IMPURITY IS REMOVED FROM SAID FRACTION BY ADDING TO SAID POP CORN POLYMER, AND REMOVING
Claim 2
Dependent Claim
49 words
A PROCESS FOR PURIFYING A HYDROCARBON FRACTION COMPRISING A MONO-OLEFIN AND CONTAINING A CONJUGATED MONOMERIC DIOLEFIN AS AN IMPURITY, COMPRISING THE STEPS OF CONTACTING SUCH A HYDROCARBON FRACTION WITH POP CORN POLYMER, WHEREBY SAID IMPURITY IS REMOVED FROM SAID FRACTION BY ADDING TO SAID POP CORN POLYMER, AND REMOVING
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) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |