US2767187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isolation of gamma picoline
Assignee: Pittsburgh Coke and Chemical Co
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Filing: 1954-12-29
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Granted: 1956-10-16
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Expires: 1974-12-29
Abstract
No abstract record available.
Inventors
- 👤 Marvin O Shrader
- 👤 Harold L Dimond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:14
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
4 words
A PROCESS OF PREPARING
Claim 2
Dependent Claim
4 words
A PROCESS OF PREPARING
Claim 3
Dependent Claim
68 words
A PROCESS FOR SEPARATING GAMMA-PICOLINE FROM A MIXTURE THEREOF WITH A LEAST ONE MEMBER OF THE GROUP CONSISTING OF BETA-PICOLINE AND 2,6-LUTIDINE COMPRISING TREATING THE MIXTURE WITH A CUPRIC SALT AND WITH A CHLORIDE IN THE PRESENCE OF SUFFICIENT WATER TO PREVENT THE PRECIPITATION OF A BETA-PICOLINE COPPER COMPLEX, SEPARATING THE GAMMA-PICOLINE-CUPRIC CHLORIDE ADDITION COMPOUND AS A PRECIPITATE AND RECOVERING THE PRUIFIED GAMMA-PICOLINE FROM THE SEPARATED ADDITION COMPOUND.
Claim 4
Dependent Claim
68 words
A PROCESS FOR SEPARATING GAMMA-PICOLINE FROM A MIXTURE THEREOF WITH A LEAST ONE MEMBER OF THE GROUP CONSISTING OF BETA-PICOLINE AND 2,6-LUTIDINE COMPRISING TREATING THE MIXTURE WITH A CUPRIC SALT AND WITH A CHLORIDE IN THE PRESENCE OF SUFFICIENT WATER TO PREVENT THE PRECIPITATION OF A BETA-PICOLINE COPPER COMPLEX, SEPARATING THE GAMMA-PICOLINE-CUPRIC CHLORIDE ADDITION COMPOUND AS A PRECIPITATE AND RECOVERING THE PRUIFIED GAMMA-PICOLINE FROM THE SEPARATED ADDITION COMPOUND.
References Cited (Backward Citations)
GB701179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |