US2721119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stripping tin from copper
Assignee: Motors Liquidation Co
•
Filing: 1953-05-14
•
Granted: 1955-10-18
•
Expires: 1973-05-14
Abstract
No abstract record available.
Inventors
- 👤 Bauch Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
C; C22; C22B; C22B25/00; C22B25/06; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
THE PROCESS OF STRIPPING TIN FROM METAL CONTAINING A SUBSTANTIAL PROPORTION OF COPPER WHICH INCLUDES REMOVING ANY ORGANIC MATERIAL IF ANY WHICH MAY BE COVERING THE TIN, IMMERSING THE TIN COATED METAL CONTAINING COPPER IN A DILUTE SULPHURIC ACID SOLUTION CONTAINING AS THE ESSENTIAL INGREDIENT COPPER IONS IN THE AMOUNT OF 28 TO 56 GRAMS PER LITER FOR A PERIOD OF TIME SUFFCIENT TO STRIP THE TIN FROM THE METAL AND THE IMMERSING THE METAL IN A BRIGHT DIP SOLUTION CONTAINING NITRIC AND SULPHURIC ACIDS.
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) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |