US984498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating corrosive gaseous fumes or smoke.
Assignee: US SMELTING REFINING AND MINING CO
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Filing: 1908-04-07
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Granted: 1911-02-14
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Expires: 1928-04-07
Abstract
No abstract record available.
Inventors
- 👤 Clarence B Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:02
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/08
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) | 1914-02-13 | 1914-08-15 | 1915-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-02-13 | 1918-08-15 | 1919-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-02-13 | 1922-08-15 | 1923-02-14 | $7700.00 | Window Closed / Lapsed |