Patent US2672739A successfully refreshed from Google Patents.
US2284593A
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Process for decolorizing solutions
Assignee: Individual
•
Filing: 1938-08-03
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Granted: 1942-05-26
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Expires: 1958-08-03
Abstract
No abstract record available.
Inventors
- 👤 Seidel Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:27
CPC Classifications
B; B01; B01D; B01D15/00; B01J; B01J20/00; B01J20/22; B01J20/24; B01J20/30; B01J20/34; B01J20/3425; B01J20/345; B01J20/3475; C; C13; C13B; C13B20/00; C13B20/12; B01J2220/00; B01J2220/40; B01J2220/48; B01J2220/4812; B01J2220/4837; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
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) | 1945-05-25 | 1945-11-24 | 1946-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-05-25 | 1949-11-24 | 1950-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-05-25 | 1953-11-24 | 1954-05-26 | $7700.00 | Window Closed / Lapsed |