US2796145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cleaners
Assignee: Individual
•
Filing: 1953-01-27
•
Granted: 1957-06-18
•
Expires: 1973-01-27
Abstract
No abstract record available.
Inventors
- 👤 King William Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:35
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D45/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US302163A
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US901237A
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US905999A
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US1289421A
Cited
DE402205C
Cited
FR649850A
Cited
US2286480A
Cited
US2349944A
Cited
US2610697A
Cited
US2645304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |