Patent US2705246A successfully refreshed from Google Patents.
US2705246A
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Separation of organic nitrogen compounds
Assignee: Bayer AG
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Filing: 1951-03-09
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Granted: 1955-03-29
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Expires: 1971-03-09
Abstract
No abstract record available.
Inventors
- 👤 Knust Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:02
CPC Classifications
C; C07; C07C; C07C213/00; C07C213/10; C07B; C07B63/00; C07C209/00; C07C209/82; C07C209/84; C07C209/86; C07C211/00; C07C211/43; C07C211/44; C07C211/49; C07C211/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE PROCESS OF SEPARATION A MIXTURE OF NITROGEN COMPOUNDS OF THE GROUP CONSISTING OF MONO-, DI, AND TRIMETHYLAMINE AND AMMONIA WHICH INCLUDES THE STEPS OF CONTACTING SAID MIXTURE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF PHENOLS AND NAPHTHOLS, WHEREBY AT LEAST ONE OF SAID NITROGEN COMPOUNDS IS ABSORBED BY SAID GROUP MEMBER, SEPARATING THE UNABSORBED FRACTION AND THEREAFTER EXPELLING THE ABSORBED NITROGEN COMPOUNDS.
Claim 2
Dependent Claim
65 words
THE PROCESS OF SEPARATION A MIXTURE OF NITROGEN COMPOUNDS OF THE GROUP CONSISTING OF MONO-, DI, AND TRIMETHYLAMINE AND AMMONIA WHICH INCLUDES THE STEPS OF CONTACTING SAID MIXTURE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF PHENOLS AND NAPHTHOLS, WHEREBY AT LEAST ONE OF SAID NITROGEN COMPOUNDS IS ABSORBED BY SAID GROUP MEMBER, SEPARATING THE UNABSORBED FRACTION AND THEREAFTER EXPELLING THE ABSORBED NITROGEN COMPOUNDS.
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) | 1958-03-28 | 1958-09-27 | 1959-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-28 | 1962-09-27 | 1963-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-28 | 1966-09-27 | 1967-03-29 | $7700.00 | Window Closed / Lapsed |