Patent US3267035A successfully refreshed from Google Patents.
Patent US3098017A successfully refreshed from Google Patents.
US3098017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating unsymmetrical dimethylhydrazine from aqueous solutions containing same
Assignee: Honeywell International Inc
•
Filing: 1959-10-12
•
Granted: 1963-07-16
•
Expires: 1979-10-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles R Walter
- 👤 Billy E Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:37
CPC Classifications
C; C07; C07C; C07C241/00; C07C241/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS OF SEPARATING UNSYMMETRICAL DIMETHYLHYDRAZINE FROM AQUEOUS SOLUTIONS CONTAINING UNSYMMETRICAL DIMETHYLHYDRAZINE WHICH COMPRISES EXTRACTIVELY DISTILLING THE AQUEOUS SOLUTION OF UNSYMMETRICAL DIMETHYLHYDRAZINE IN THE PRESENCE OF MONEOTHANOLAMINE AND TAKING OFF OVERHEAD UNSYMMETRICAL DIMETHYLHYDRAZINE SUBSTANTIALLY FREE OF WATER AND OF MONEOTHANOLAMINE, WHILE REMOVING AS BOTTOMS AN AQUEOUS SOLUTION OF MONOETHANOLAMINE.
Claim 2
Dependent Claim
49 words
A PROCESS OF SEPARATING UNSYMMETRICAL DIMETHYLHYDRAZINE FROM AQUEOUS SOLUTIONS CONTAINING UNSYMMETRICAL DIMETHYLHYDRAZINE WHICH COMPRISES EXTRACTIVELY DISTILLING THE AQUEOUS SOLUTION OF UNSYMMETRICAL DIMETHYLHYDRAZINE IN THE PRESENCE OF MONEOTHANOLAMINE AND TAKING OFF OVERHEAD UNSYMMETRICAL DIMETHYLHYDRAZINE SUBSTANTIALLY FREE OF WATER AND OF MONEOTHANOLAMINE, WHILE REMOVING AS BOTTOMS AN AQUEOUS SOLUTION OF MONOETHANOLAMINE.
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) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |