US2764589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of heterocyclic nitrogen compounds
Assignee: Phillips Petroleum Co
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Filing: 1952-08-06
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Granted: 1956-09-25
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Expires: 1972-08-06
Abstract
No abstract record available.
Inventors
- 👤 Paul S Hudson
- 👤 Warren L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:49
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A METHOD OF STABILIZING A POLYMERIZABLE VINYLPYRIDINE COMPOUND AGAINST POLYMERIZATION DURING STORAGE AND DISTILLATION BY TREATING SAID COMPOUND WITH IODINE IN AN AMOUNT FROM ABOUT 0.005 TO ABOUT 5.0 PER CENT BY WEIGHT BASED ON THE WEIGHT OF THE VINYLPYRIDINE COMPOUND BEING STABILIZED.
Claim 2
Independent Claim
43 words
A METHOD OF STABILIZING A POLYMERIZABLE VINYLPYRIDINE COMPOUND AGAINST POLYMERIZATION DURING STORAGE AND DISTILLATION BY TREATING SAID COMPOUND WITH IODINE IN AN AMOUNT FROM ABOUT 0.005 TO ABOUT 5.0 PER CENT BY WEIGHT BASED ON THE WEIGHT OF THE VINYLPYRIDINE COMPOUND BEING STABILIZED.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |