US3330620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for oxidizing ammonium sulfite to ammonium sulfate
Assignee: Empresa Auxiliar de la Industria SA
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Filing: 1963-04-22
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Granted: 1967-07-11
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Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Vian-Ortuno Angel
- 👤 Martin-Municio Vicente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:58
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/24; C01C1/245; C01C1/246; C01C1/247; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/38; C22B3/387; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A METHOD OF OXIDIZING AMMONIUM SULFITE TO AMMMONIUM SULFATE, THE STEP OF CONTACTING WITH AN OXYGENCONTAINING GAS AN AQUEOUS AMMONIUM SULFITE-CONTAINING SOLUTION HAVING DISPERSED THERETHROUGH, AS THE ONLY SUBSTANCE PROMOTING THE REACTION BETWEEN SAID OXYGEN-CONTAINING GAS AND SAID AMMONIUM SULFITE, AN ORGANIC, NITROGEN-CONTAINING BASE SO AS TO OXIDIZE SAID AMMONIUM SULFITE OF SAID SOLUTION TO AMMONIUM SULFATE THEREBY FORMING AN AQUEOUS AMMONIUM SULFATE-CONTAINING SOLUTION WHICH IS SUBSTANTIALLY FREE OF AMMONIUM SULFITE.
Claim 2
Dependent Claim
72 words
IN A METHOD OF OXIDIZING AMMONIUM SULFITE TO AMMMONIUM SULFATE, THE STEP OF CONTACTING WITH AN OXYGENCONTAINING GAS AN AQUEOUS AMMONIUM SULFITE-CONTAINING SOLUTION HAVING DISPERSED THERETHROUGH, AS THE ONLY SUBSTANCE PROMOTING THE REACTION BETWEEN SAID OXYGEN-CONTAINING GAS AND SAID AMMONIUM SULFITE, AN ORGANIC, NITROGEN-CONTAINING BASE SO AS TO OXIDIZE SAID AMMONIUM SULFITE OF SAID SOLUTION TO AMMONIUM SULFATE THEREBY FORMING AN AQUEOUS AMMONIUM SULFATE-CONTAINING SOLUTION WHICH IS SUBSTANTIALLY FREE OF AMMONIUM SULFITE.
References Cited (Backward Citations)
US1106919A
Cited
US2970039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |