US2730489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of organic nitrites to inhibit polymerization of hydrocarbons during distillation
Assignee: EIDP Inc
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Filing: 1951-09-21
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Granted: 1956-01-10
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Expires: 1971-09-21
Abstract
No abstract record available.
Inventors
- 👤 Ernest E Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:04
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315; C07; C07C; C07C7/00; C07C7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR MINIMIZING POLYMER FORMATION WHEN DISTILLING A COMPOSITION COMPRISING A MAJOR PORTION OF HYDROCARBONS CONTAINING NO MORE THAN SIX CARBON ATOMS, SAID COMPOSITION CONTAINING PARAFFINS AND MONOOLEFINS IN MAJOR AMOUNT AND AT LEAST 0.01 PER CENT BY WEIGHT OF A DIOLEFIN HAVING FROM 3 TO 6 CARBON ATOMS, WHICH PROCESS COMPRISES CARRYING OUT THE DISTILLATION OF SAID COMPOSITION WHILE MAINTAINING PRESENT THEREIN THROUGHOUT THE DISTILLATION A POLYMERIZATION INHIBITOR COMPRISING FROM 0.001 PER CENT TO 5 PER CENT, BASED ON THE WEIGHT OF SAID COMPOSITION, OF A NITRITE OF THE FORMULA R.NO2 IN WHICH R IS A HYDROCARBON RADICAL HAVING FROM ONE TO EIGHT CARBON ATOMS AND HAVING AN ALKYL CARBON ATOM TO WHICH THE NITRITE GROUP IS ATTACHED.
Claim 2
Dependent Claim
120 words
A PROCESS FOR MINIMIZING POLYMER FORMATION WHEN DISTILLING A COMPOSITION COMPRISING A MAJOR PORTION OF HYDROCARBONS CONTAINING NO MORE THAN SIX CARBON ATOMS, SAID COMPOSITION CONTAINING PARAFFINS AND MONOOLEFINS IN MAJOR AMOUNT AND AT LEAST 0.01 PER CENT BY WEIGHT OF A DIOLEFIN HAVING FROM 3 TO 6 CARBON ATOMS, WHICH PROCESS COMPRISES CARRYING OUT THE DISTILLATION OF SAID COMPOSITION WHILE MAINTAINING PRESENT THEREIN THROUGHOUT THE DISTILLATION A POLYMERIZATION INHIBITOR COMPRISING FROM 0.001 PER CENT TO 5 PER CENT, BASED ON THE WEIGHT OF SAID COMPOSITION, OF A NITRITE OF THE FORMULA R.NO2 IN WHICH R IS A HYDROCARBON RADICAL HAVING FROM ONE TO EIGHT CARBON ATOMS AND HAVING AN ALKYL CARBON ATOM TO WHICH THE NITRITE GROUP IS ATTACHED.
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) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |