US2806784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for wet-refining non-ferrous metals and metal alloys
Assignee: Individual
•
Filing: 1952-12-15
•
Granted: 1957-09-17
•
Expires: 1972-12-15
Abstract
No abstract record available.
Inventors
- 👤 Martiny Jean Raymond Valere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:26
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/10; C22B3/00; C22B3/04; C22B3/06; C22B3/065; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR ELIMINATING LEAD IMPURITIES FROM NONFERROUS METALLIC MATERIALS SELECTED FROM THE GROUP WHICH CONSISTS OF COPPER, ALUMINUM AND THEIR ALLOYS, COMPRISING THE STEPS OF COMMINUTING THE MATERIAL TO BE PURIFIED AND IMMERSING THE RESULTING METALLIC FRAGMENTS, AT AMBIENT TEMPERATURE, IN A DILUTED AQUEOUS SOLUTION OF NITRIC ACID HAVING A LIQUID SURFACTANT ADMIXED WITH IT, THE AMOUNT OF SAID SURFACTANT BEING A SMALL PROPORTION OF THE AMOUNT OF NITRIC ACID IN SAID SOLUTION.
Claim 2
Dependent Claim
74 words
A PROCESS FOR ELIMINATING LEAD IMPURITIES FROM NONFERROUS METALLIC MATERIALS SELECTED FROM THE GROUP WHICH CONSISTS OF COPPER, ALUMINUM AND THEIR ALLOYS, COMPRISING THE STEPS OF COMMINUTING THE MATERIAL TO BE PURIFIED AND IMMERSING THE RESULTING METALLIC FRAGMENTS, AT AMBIENT TEMPERATURE, IN A DILUTED AQUEOUS SOLUTION OF NITRIC ACID HAVING A LIQUID SURFACTANT ADMIXED WITH IT, THE AMOUNT OF SAID SURFACTANT BEING A SMALL PROPORTION OF THE AMOUNT OF NITRIC ACID IN SAID SOLUTION.
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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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |