US2555216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical precipitator
Assignee: Research Corp
•
Filing: 1946-09-24
•
Granted: 1951-05-29
•
Expires: 1966-09-24
Abstract
No abstract record available.
Inventors
- 👤 Harry A Wintermute
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:03
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1339480A
Cited
US1766421A
Cited
US1968334A
Cited
US2245516A
Cited
FR871845A
Cited
US2404789A
Cited
US2374715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |