US2876173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of unsymmetrical dimethyl-hydrazine from aqueous solution containing not more than 20 percent of the former, caustic soda
Assignee: Olin Corp
•
Filing: 1955-12-13
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Granted: 1959-03-03
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Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Bernard H Nicolaisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:41
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
IN THE SEPARATION OF UNSYMMETRICAL DIMETHYLHDRAZINE FROM AQUEOUS SOLUTION, THE STEP OF DISTILLING AN AQUEOUS SOLUTION OF UNSYMMETRICAL DIMETHLHYDRAZINE CONTAINING NOT MORE THAN ABOUT 20 MOLE PERCENT OF UNSYMMETRICAL DIMETHYLHYDRAZINE AND ABOUT 1 TO 30 WEIGHT PERCENT OF CAUSTIC SODA.
Claim 2
Dependent Claim
40 words
IN THE SEPARATION OF UNSYMMETRICAL DIMETHYLHDRAZINE FROM AQUEOUS SOLUTION, THE STEP OF DISTILLING AN AQUEOUS SOLUTION OF UNSYMMETRICAL DIMETHLHYDRAZINE CONTAINING NOT MORE THAN ABOUT 20 MOLE PERCENT OF UNSYMMETRICAL DIMETHYLHYDRAZINE AND ABOUT 1 TO 30 WEIGHT PERCENT OF CAUSTIC SODA.
References Cited (Backward Citations)
US2676911A
Cited
US2678298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |