Patent US2335209A successfully refreshed from Google Patents.
US2335209A
Expired / Lapsed
US
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Treatment of liquids from papermaking processes
Assignee: Chemical Construction Corp
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Filing: 1941-04-05
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Granted: 1943-11-23
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Expires: 1961-04-05
Abstract
No abstract record available.
Inventors
- 👤 Robert B Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:25
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D1/006; B03D1/01; D; D21; D21F; D21F1/00; D21F1/66; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917; Y10S210/928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-11-22 | 1947-05-24 | 1947-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-22 | 1951-05-24 | 1951-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-22 | 1955-05-24 | 1955-11-23 | $7700.00 | Window Closed / Lapsed |