Patent US4660560A successfully refreshed from Google Patents.
US1769146A
Expired / Lapsed
US
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Tuyere
Assignee: Anaconda Copper Mining Co
•
Filing: 1928-10-16
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Granted: 1930-07-01
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Expires: 1948-10-16
Abstract
No abstract record available.
Inventors
- 👤 Laist Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:48
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/04; F; F27; F27D; F27D3/00; F27D3/16; 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) | 1933-06-30 | 1933-12-30 | 1934-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-30 | 1937-12-30 | 1938-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-30 | 1941-12-30 | 1942-07-01 | $7700.00 | Window Closed / Lapsed |