US2464127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of activating acid activatable clays
Assignee: Filtrol Corp
•
Filing: 1944-05-19
•
Granted: 1949-03-08
•
Expires: 1964-05-19
Abstract
No abstract record available.
Inventors
- 👤 Wright W Gary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:36
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1752721A
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US1800687A
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US1980569A
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US1999773A
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US2300878A
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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) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |