Patent US3166558A successfully refreshed from Google Patents.
US3166558A
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Method for preparing diazabicyclo-(2, 2, 2)-octane
Assignee: Air Products and Chemicals Inc
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Filing: 1961-08-11
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Granted: 1965-01-19
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Expires: 1981-08-11
Abstract
No abstract record available.
Inventors
- 👤 Rocco L Mascioli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:34
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE METHOD OF PREPARING DIAZABICYCLO-(2,2,2)-OCTANE WHICH COMPRISES INITIALLY REACTING DIETHANOLAMINE UNDER ACID CONDENSATION CONDITIONS TO ELIMINATE WATER AND EFFECT RING CLOSURE PRODUCING A REACTION PRODUCT RICH IN N-N''-BIS-HYDROXYETHYLPIPERAZINE, AND PASSING THE TOTAL REACTION PRODUCT OVER SILICA-ALUMINA CRACKING CATALYST AT 500-800*F., TOGETHER WITH AT LEAST 2 MOLS NH3/MOL OF CHARGE AND FRACTIONATING THE LIQUID EFFLUENT TO ISOLATE A CUT CONSISTING ESSENTIALLY OF DIAZABICYCLO-(2,2,2)-OCTANE.
Claim 2
Independent Claim
62 words
THE METHOD OF PREPARING DIAZABICYCLO-(2,2,2)-OCTANE WHICH COMPRISES INITIALLY REACTING DIETHANOLAMINE UNDER ACID CONDENSATION CONDITIONS TO ELIMINATE WATER AND EFFECT RING CLOSURE PRODUCING A REACTION PRODUCT RICH IN N-N''-BIS-HYDROXYETHYLPIPERAZINE, AND PASSING THE TOTAL REACTION PRODUCT OVER SILICA-ALUMINA CRACKING CATALYST AT 500-800*F., TOGETHER WITH AT LEAST 2 MOLS NH3/MOL OF CHARGE AND FRACTIONATING THE LIQUID EFFLUENT TO ISOLATE A CUT CONSISTING ESSENTIALLY OF DIAZABICYCLO-(2,2,2)-OCTANE.
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) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |