Patent US1702575A successfully refreshed from Google Patents.
US1702575A
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US
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Metallurgical apparatus and process
Assignee: FARLEY G CLARK
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Filing: 1921-04-21
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Granted: 1929-02-19
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Expires: 1941-04-21
Abstract
No abstract record available.
Inventors
- 👤 Robertson Frederick Dun Struan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:02
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; C; C22; C22B; C22B4/00; F; F27; F27B; F27B17/00
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) | 1932-02-19 | 1932-08-20 | 1933-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-02-19 | 1936-08-20 | 1937-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-02-19 | 1940-08-20 | 1941-02-19 | $7700.00 | Window Closed / Lapsed |