US3495946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydro-mixer for the recovery of substantially impurity-free copper powder from leached malachite and azurite copper powder
Assignee: PERCY W HUDSON
•
Filing: 1968-02-16
•
Granted: 1970-02-17
•
Expires: 1988-02-16
Abstract
No abstract record available.
Inventors
- 👤 Percy W Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:22
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189627477A
Cited
FR436672A
Cited
US1560826A
Cited
US1997277A
Cited
US2458261A
Cited
CH288410A
Cited
US2876083A
Cited
US2909534A
Cited
US3056831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |