US1252183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electrical separation of suspended particles from gases.
Assignee: International Precipitation Co
•
Filing: 1913-09-09
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Granted: 1918-01-01
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Expires: 1933-09-09
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schmidt
- 👤 George C Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:28
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/66; B03C3/70
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) | 1920-12-31 | 1921-07-02 | 1922-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-12-31 | 1925-07-02 | 1926-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-12-31 | 1929-07-02 | 1930-01-01 | $7700.00 | Window Closed / Lapsed |