US2593377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cleaning apparatus
Assignee: Research Corp
•
Filing: 1946-05-15
•
Granted: 1952-04-15
•
Expires: 1966-05-15
Abstract
No abstract record available.
Inventors
- 👤 Harry A Wintermute
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:15
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/14; B03C3/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1185136A
Cited
DE438834C
Cited
US1853393A
Cited
US2145898A
Cited
US2225677A
Cited
US2297601A
Cited
US2343383A
Cited
US2381455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |