Patent US1555078A successfully refreshed from Google Patents.
US1555078A
Expired / Lapsed
US
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Treatment of sulphidic and other ores, mattes, residues, etc.
Assignee: JOHN P SCOTT
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Filing: 1919-08-29
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Granted: 1925-09-29
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Expires: 1939-08-29
Abstract
No abstract record available.
Inventors
- 👤 Robertson Frederick Dun Struan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:17
CPC Classifications
C; C22; C22B; C22B30/00; C22B30/02; C22B13/00; C22B15/00; C22B15/0002; C22B15/001; C22B15/0021; C22B19/00; C22B23/00; C22B23/02; C22B23/021; C22B30/04; C22B34/00; C22B34/30; C22B34/34; C22B5/00; C22B5/02; C22B5/12; 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) | 1928-09-28 | 1929-03-30 | 1929-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-09-28 | 1933-03-30 | 1933-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-09-28 | 1937-03-30 | 1937-09-29 | $7700.00 | Window Closed / Lapsed |