US2431009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam control in brown stock washing
Assignee: Individual
•
Filing: 1943-10-08
•
Granted: 1947-11-18
•
Expires: 1963-10-08
Abstract
No abstract record available.
Inventors
- 👤 Frank W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:48
CPC Classifications
D; D06; D06B; D06B5/00; D06B2700/00; D06B2700/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US908951A
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US1176428A
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US1449114A
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US1376073A
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US1967938A
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US2184195A
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US2140811A
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US2231544A
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US2257945A
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US2335641A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |