US2631167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing nitro compounds
Assignee: GAF Chemicals Corp
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Filing: 1950-03-03
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Granted: 1953-03-10
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Expires: 1970-03-03
Abstract
No abstract record available.
Inventors
- 👤 Werner Jesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:53
CPC Classifications
C; C07; C07C; C07C217/00; C07C217/02; C07C217/04; C07C217/28; C07C217/30; C07C217/32; C07C217/34; C07C209/00; C07C209/30; C07C209/32; C07C209/36; C07C211/00; C07C211/43; C07C211/44; C07C211/49; C07C211/50; C07C211/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF REDUCING MONONITROHALOGENATED BENZENES HAVING A HALOGEN IN ONE OF THE POSITIONS ORTHO- AND PARA- TO THE NITRO GROUP, WHICH COMPRISES TREATING SUCH NITRO COMPOUNDS WITH SODIUM HYDROSULFITE IN THE PRESENCE OF AT LEAST EQUIVALENT AMOUNTS THEREOF OF WATER AND AN AROMATIC TERTIARY AMINE BASE, WHEREIN THE TERTIARY AMINO NITROGEN IS LINKED DIRECTLY TO A CARBON ATOM WHICH IS PART OF THE AROMATIC NUCLEUS.
Claim 2
Independent Claim
66 words
THE METHOD OF REDUCING MONONITROHALOGENATED BENZENES HAVING A HALOGEN IN ONE OF THE POSITIONS ORTHO- AND PARA- TO THE NITRO GROUP, WHICH COMPRISES TREATING SUCH NITRO COMPOUNDS WITH SODIUM HYDROSULFITE IN THE PRESENCE OF AT LEAST EQUIVALENT AMOUNTS THEREOF OF WATER AND AN AROMATIC TERTIARY AMINE BASE, WHEREIN THE TERTIARY AMINO NITROGEN IS LINKED DIRECTLY TO A CARBON ATOM WHICH IS PART OF THE AROMATIC NUCLEUS.
References Cited (Backward Citations)
US1395238A
Cited
US1919580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |