US2557684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting polymerization of diolefins
Assignee: Standard Oil Development Co
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Filing: 1948-08-21
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Granted: 1951-06-19
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Expires: 1968-08-21
Abstract
No abstract record available.
Inventors
- 👤 John M Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:34
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/20; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF INHIBITING THE POLYMERIZATION OF A DIOLEFIN HAVING FROM 4 TO 8 CARBON ATOMS IN THE MOLECULE UNDER POLYMERIZATION CONDITIONS WHICH COMPRISES MAINTAINING IN SAID DIOLEFIN AND AMOUNT IN THE RANGE FROM 0.001% TO 1.0% BY WEIGHT, BASED ON THE AMOUNT OF DIOLEFIN, OF A PHENOLIC INHIBITING COMPOUND HAVING NO MORE THAN 10 CARBON ATOMS IN AN ALKYL SIDE CHAIN, AND AN AMOUNT IN THE RANGE FROM 5% TO 50% BY WEIGHT, BASED ON THE AMOUNT OF PHENOLIC INHIBITOR, OF AN ALIPHATIC CARBOXYLIC ACID HAVING FROM 1 TO 10 CARBON ATOMS.
Claim 2
Independent Claim
93 words
A METHOD OF INHIBITING THE POLYMERIZATION OF A DIOLEFIN HAVING FROM 4 TO 8 CARBON ATOMS IN THE MOLECULE UNDER POLYMERIZATION CONDITIONS WHICH COMPRISES MAINTAINING IN SAID DIOLEFIN AND AMOUNT IN THE RANGE FROM 0.001% TO 1.0% BY WEIGHT, BASED ON THE AMOUNT OF DIOLEFIN, OF A PHENOLIC INHIBITING COMPOUND HAVING NO MORE THAN 10 CARBON ATOMS IN AN ALKYL SIDE CHAIN, AND AN AMOUNT IN THE RANGE FROM 5% TO 50% BY WEIGHT, BASED ON THE AMOUNT OF PHENOLIC INHIBITOR, OF AN ALIPHATIC CARBOXYLIC ACID HAVING FROM 1 TO 10 CARBON ATOMS.
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) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |