Patent US2935480A successfully refreshed from Google Patents.
US2935480A
Expired / Lapsed
US
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Preparation of nitrogen oxides
Assignee: Hercules Powder Co
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Filing: 1956-07-20
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Granted: 1960-05-03
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Expires: 1976-07-20
Abstract
No abstract record available.
Inventors
- 👤 Levering Dewey Robert
- 👤 Lucien G Maury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:54
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE PREPARATION OF A NITROGEN OXIDE GAS MIXTURE PARTICULARY SUITABLE, WHEN IN LIQUID PHASE, AS A NITROSATION AGENT FOR SECONDARY AMINES WHICH COMPRISES PASSING AT LEAST ONE OF THE GROUP CONSISTING OF NITRIC OXIDE, NITROGEN DIOXIDE, NITROGEN TRIOXIDE, NITROGEN TETROXIDE, NITROGEN PENTOXIDE AND NITROUS ACID, AND MIXTURES THEREOF, AS A GAS, IN CONTACT WITH AQUEOUS NITRIC ACID AND, DURING SAID CONTACT, REACTING SAID GAS WITH SAID NITRIC ACID UNDER EQUILIBRIUM COINDITIONS OF TEMPERATURE, PRESSURE AND ACID CONCENTRATION WITHIN THE RESPECTIVE RANGES OF 25 TO 100* C., 0.5 TO 15 ATMOSPHERES, AND
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE PREPARATION OF A NITROGEN OXIDE GAS MIXTURE PARTICULARY SUITABLE, WHEN IN LIQUID PHASE, AS A NITROSATION AGENT FOR SECONDARY AMINES WHICH COMPRISES PASSING AT LEAST ONE OF THE GROUP CONSISTING OF NITRIC OXIDE, NITROGEN DIOXIDE, NITROGEN TRIOXIDE, NITROGEN TETROXIDE, NITROGEN PENTOXIDE AND NITROUS ACID, AND MIXTURES THEREOF, AS A GAS, IN CONTACT WITH AQUEOUS NITRIC ACID AND, DURING SAID CONTACT, REACTING SAID GAS WITH SAID NITRIC ACID UNDER EQUILIBRIUM COINDITIONS OF TEMPERATURE, PRESSURE AND ACID CONCENTRATION WITHIN THE RESPECTIVE RANGES OF 25 TO 100* C., 0.5 TO 15 ATMOSPHERES, AND
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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |