US3063980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing aromatic nitrogen compounds
Assignee: GAF Chemicals Corp
•
Filing: 1957-07-09
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Granted: 1962-11-13
•
Expires: 1977-07-09
Abstract
No abstract record available.
Inventors
- 👤 Bloom Albert
- 👤 David E Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:57
CPC Classifications
C; C07; C07C; C07C241/00; C07C241/02; C07C209/00; C07C209/30; C07C209/32; C07C209/36; C07C245/00; C07C245/02; C07C245/06; C07C245/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD FOR REDUCING AN AROMATIC NITROGEN COMPOUND CONTAINING NITROGEN IN A REDUCIBLE FORM AS A NUCLEAR SUBSTITUENT AT A HIGHER STAGE OF OXIDATION THAN THE HYDRAZO STAGE, SAID NUCLEAR SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF NITRO, NITROSO, HYDROXYLAMINO AZOXY AND AZO TO A STAGE BEYOND THE AZOXY STAGE WHERE THE SAID NUCLEAR SUBSTITUENT IS A MEMBER OF THE GROUP CONSISTING OF NITRO, NITROSO, HYDROXYLAMINO AND AZOXY, AND TO HYDRAZO WHERE THE SAID NUCLEAR SUBSTITUENT IS AZO WHICH CONSIST ESSNTIALLY IN HEATING SAID AROMATIC NITROGEN COMPOUND WITH A REDUCING MIXTURE OF AN ALKALI METAL HYDROXIDE AND A LOWER ALCOHOL IN THE PRESENCE OF AT LEAST ABOUT 1/1000 OF A MOLE OF A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF NICKEL AND NOBLE METAL CATALYST PER MOLE OF SAID AROMATIC NITROGEN COMPOUND.
Claim 2
Independent Claim
133 words
A METHOD FOR REDUCING AN AROMATIC NITROGEN COMPOUND CONTAINING NITROGEN IN A REDUCIBLE FORM AS A NUCLEAR SUBSTITUENT AT A HIGHER STAGE OF OXIDATION THAN THE HYDRAZO STAGE, SAID NUCLEAR SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF NITRO, NITROSO, HYDROXYLAMINO AZOXY AND AZO TO A STAGE BEYOND THE AZOXY STAGE WHERE THE SAID NUCLEAR SUBSTITUENT IS A MEMBER OF THE GROUP CONSISTING OF NITRO, NITROSO, HYDROXYLAMINO AND AZOXY, AND TO HYDRAZO WHERE THE SAID NUCLEAR SUBSTITUENT IS AZO WHICH CONSIST ESSNTIALLY IN HEATING SAID AROMATIC NITROGEN COMPOUND WITH A REDUCING MIXTURE OF AN ALKALI METAL HYDROXIDE AND A LOWER ALCOHOL IN THE PRESENCE OF AT LEAST ABOUT 1/1000 OF A MOLE OF A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF NICKEL AND NOBLE METAL CATALYST PER MOLE OF SAID AROMATIC NITROGEN COMPOUND.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |