US2592508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical precipitator
Assignee: Research Corp
•
Filing: 1950-02-10
•
Granted: 1952-04-08
•
Expires: 1970-02-10
Abstract
No abstract record available.
Inventors
- 👤 Phyl Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:19
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1163753A
Cited
DE349964C
Cited
US1486032A
Cited
FR610183A
Cited
US1929712A
Cited
US2061045A
Cited
US2098667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |