Patent US2640853A successfully refreshed from Google Patents.
US2640853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of organic sulfonyl hydrazides
Assignee: Uniroyal Inc
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Filing: 1951-07-10
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Granted: 1953-06-02
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Expires: 1971-07-10
Abstract
No abstract record available.
Inventors
- 👤 Norman K Sundholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:33
CPC Classifications
C; C07; C07C; C07C311/00; C07C311/48; C07C311/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN A METHOD OF FORMING AN ORGANIC SULFONYL HYDRAZIDE FROM HYDRAZINE AND AN ORGANIC SULFONYL CHLORIDE WHOSE SOLE REACTIVE GROUPING IS THE SULFONYL CHLORIDE GROUP, THE IMPROVEMENT WHICH CONSISTS IN THE STEP OF CARRYING OUT THE REACTION IN AQUEOUS SUSPENSION IN THE PRESENCE OF AMMONIA IN AMOUNT SUFFICIENT TO NEUTRALIZE THE HYDROCHLORIC ACID WHICH IS FORMED DURING THE REACTION.
Claim 2
Dependent Claim
59 words
IN A METHOD OF FORMING AN ORGANIC SULFONYL HYDRAZIDE FROM HYDRAZINE AND AN ORGANIC SULFONYL CHLORIDE WHOSE SOLE REACTIVE GROUPING IS THE SULFONYL CHLORIDE GROUP, THE IMPROVEMENT WHICH CONSISTS IN THE STEP OF CARRYING OUT THE REACTION IN AQUEOUS SUSPENSION IN THE PRESENCE OF AMMONIA IN AMOUNT SUFFICIENT TO NEUTRALIZE THE HYDROCHLORIC ACID WHICH IS FORMED DURING THE REACTION.
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) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |