Patent US1949928A successfully refreshed from Google Patents.
US1949928A
Expired / Lapsed
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Process of making copper sulphate from metallic copper and its alloys
Assignee: Grasselli Chemical Co
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Filing: 1932-11-08
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Granted: 1934-03-06
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Expires: 1952-11-08
Abstract
No abstract record available.
Inventors
- 👤 Harry P Corson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:58
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; C22B15/0065; C22B15/0067; C22B15/0071; C22B15/0084; C22B15/0089; C22B15/0093; C22B7/00; C22B7/006; C22B7/007; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-03-05 | 1937-09-04 | 1938-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-03-05 | 1941-09-04 | 1942-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-03-05 | 1945-09-04 | 1946-03-06 | $7700.00 | Window Closed / Lapsed |