US2969851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas washing apparatus
Assignee: Standard Steel Corp
•
Filing: 1959-04-13
•
Granted: 1961-01-31
•
Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Marvin B Preeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:14
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US948062A
Cited
US964428A
Cited
US2473672A
Cited
US2560069A
Cited
BE515685A
Cited
FR1091777A
Cited
FR1171853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |