Patent US2937176A successfully refreshed from Google Patents.
US2937176A
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Preparation of diazabicyclo-octane
Assignee: Houdry Process Corp
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Filing: 1956-12-17
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Granted: 1960-05-17
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Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Elbert C Herrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:30
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF PREPARING DIAZABICYCLO-(2.2.2)OCTANE WHICH COMPRISES PASSING AN ALKYLENE POLYAMINE HAVING FROM 2 TO 10 CARBON ATOMS IN VAPOR PHASE OVER ACTIVE SOLID SILICEOUS CRACKING CATALYSTS AT A TEMPERATURE IN THE RANGE OF 300 TO 500*C., SEPARATING FROM THE REACTION PRODUCT A FRACTION BOILING ABOVE PIPERAZINE, AND RECOVERING THE SAID DIAZABICYCLO-OCTANE FROM SAID FRACTION, SAID ALKYLENE POLYAMINE BEING ONE IN WHICH THE AMINO GROUPS ARE SEPARATED BY 2 CARBON ATOMS.
Claim 2
Independent Claim
71 words
THE METHOD OF PREPARING DIAZABICYCLO-(2.2.2)OCTANE WHICH COMPRISES PASSING AN ALKYLENE POLYAMINE HAVING FROM 2 TO 10 CARBON ATOMS IN VAPOR PHASE OVER ACTIVE SOLID SILICEOUS CRACKING CATALYSTS AT A TEMPERATURE IN THE RANGE OF 300 TO 500*C., SEPARATING FROM THE REACTION PRODUCT A FRACTION BOILING ABOVE PIPERAZINE, AND RECOVERING THE SAID DIAZABICYCLO-OCTANE FROM SAID FRACTION, SAID ALKYLENE POLYAMINE BEING ONE IN WHICH THE AMINO GROUPS ARE SEPARATED BY 2 CARBON ATOMS.
References Cited (Backward Citations)
US2454404A
Cited
US2467205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |