Patent US179462A successfully refreshed from Google Patents.
US179462A
Expired / Lapsed
US
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Improvement in the preparation of copper
Assignee: —
•
Filing: —
•
Granted: 1876-07-04
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Expires: 1893-07-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:35
CPC Classifications
C; C23; C23D; C23D3/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/302; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12597; Y10T428/12604; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917
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) | 1879-07-04 | 1880-01-03 | 1880-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1883-07-04 | 1884-01-03 | 1884-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1887-07-04 | 1888-01-03 | 1888-07-04 | $7700.00 | Window Closed / Lapsed |