Patent US1478798A successfully refreshed from Google Patents.
US1478798A
Expired / Lapsed
US
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Apparatus for electrical treatment of gases
Assignee: International Precipitation Co
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Filing: 1919-05-27
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Granted: 1923-12-25
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Expires: 1939-05-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:14
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/06
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) | 1926-12-24 | 1927-06-25 | 1927-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-12-24 | 1931-06-25 | 1931-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-12-24 | 1935-06-25 | 1935-12-25 | $7700.00 | Window Closed / Lapsed |