US2826581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibitor removal from vinyl pyridines
Assignee: Phillips Petroleum Co
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Filing: 1955-03-14
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Granted: 1958-03-11
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Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 John E Mahan
- 👤 Stanley D Turk
- 👤 Ralph P Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:48
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C08; C08F; C08F2/00; C08F2/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD OF TREATING A VINYLPYRIDINE CONTAINING INHIBITING AMOUNTS OF AN INHIBITOR SELECTED FROM THE GROUP CONSISTING OF MONOHYDROXY AMD DIHYDROXY SUBSTITUTED AROMATIC ORGANIC COMPOUNDS TO REDUCE THE CONCENTRATION OF SAID INHIBITOR COMPOUND IN SAID MONOMER, THE SAID PROCESS COMPRISING PERCOLATING SAID VINYLPYRIDINE CONTAINING SAID INHIBITOR THROUGH AN ADSORBENT HAVING A PARTICLE SIZE IN THE RANGE OF 20 TO 60 MESH AND COMPRISING A COMPOUND OF ALUMINUM SELECTED FROM THE GROUP CONSISTING OF REFINED ALUMINA CONTAINING ALKALI METAL ALUMINATE AND ALKALI METAL ALUMINATES.
Claim 2
Independent Claim
83 words
A METHOD OF TREATING A VINYLPYRIDINE CONTAINING INHIBITING AMOUNTS OF AN INHIBITOR SELECTED FROM THE GROUP CONSISTING OF MONOHYDROXY AMD DIHYDROXY SUBSTITUTED AROMATIC ORGANIC COMPOUNDS TO REDUCE THE CONCENTRATION OF SAID INHIBITOR COMPOUND IN SAID MONOMER, THE SAID PROCESS COMPRISING PERCOLATING SAID VINYLPYRIDINE CONTAINING SAID INHIBITOR THROUGH AN ADSORBENT HAVING A PARTICLE SIZE IN THE RANGE OF 20 TO 60 MESH AND COMPRISING A COMPOUND OF ALUMINUM SELECTED FROM THE GROUP CONSISTING OF REFINED ALUMINA CONTAINING ALKALI METAL ALUMINATE AND ALKALI METAL ALUMINATES.
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) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |