Patent US2891965A successfully refreshed from Google Patents.
US2891965A
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Preparation of heterocyclic compounds
Assignee: Houdry Process Corp
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Filing: 1956-10-03
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Granted: 1959-06-23
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Expires: 1976-10-03
Abstract
No abstract record available.
Inventors
- 👤 Sterling E Voltz
- 👤 Jack H Krause
- 👤 William E Erner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:37
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; C07D209/00; C07D209/02; C07D209/04; C07D209/08; C07D209/56; C07D209/80; C07D209/82; C07D209/86; C07D233/00; C07D233/54; B01J37/00; B01J37/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF CARRYING OUT DEHYDROCYCLIZATION REACTIONS EFFECTING CARBON TO NITROGEN RING CLOSURE OF A PRECURSOR COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORTHO ETHYL ANILINE, ORTHO PHENYL ANILINE, 2-BENZYL PYRIDINE AND 2-ALKYL PYRIDINE HAVING 3 TO 5 CARBON ATOMS IN THE ALKYL CHAIN: WHICH METHOD COMPRISES CONTACTING SUCH PRECURSOR COMPOUND IN VAPOR STATE WITH SOLID CATALYST PREPARED BY IMPREGNATION OF ACTIVATED ALUMINA WITH CHLOROPLATINIC ACID AND VAPOR PHASE SULFIDATION OF THE THUS IMPREGNATED ALUMINA IN DRY STATE.
Claim 2
Independent Claim
78 words
THE METHOD OF CARRYING OUT DEHYDROCYCLIZATION REACTIONS EFFECTING CARBON TO NITROGEN RING CLOSURE OF A PRECURSOR COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORTHO ETHYL ANILINE, ORTHO PHENYL ANILINE, 2-BENZYL PYRIDINE AND 2-ALKYL PYRIDINE HAVING 3 TO 5 CARBON ATOMS IN THE ALKYL CHAIN: WHICH METHOD COMPRISES CONTACTING SUCH PRECURSOR COMPOUND IN VAPOR STATE WITH SOLID CATALYST PREPARED BY IMPREGNATION OF ACTIVATED ALUMINA WITH CHLOROPLATINIC ACID AND VAPOR PHASE SULFIDATION OF THE THUS IMPREGNATED ALUMINA IN DRY STATE.
References Cited (Backward Citations)
US2409676A
Cited
US2658028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |