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US2442455A
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Concentration of nonmicaceous, water-insoluble alkaline-earth metal salt minerals
Assignee: Wyeth Holdings LLC
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Filing: 1944-08-23
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Granted: 1948-06-01
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Expires: 1964-08-23
Abstract
No abstract record available.
Inventors
- 👤 Booth Robert Ben
- 👤 Carpenter Joseph Emmett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:19
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D1/02; B03D1/021; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1170665A
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US1996035A
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US2116727A
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US2105827A
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US2163701A
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US2216992A
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US2310240A
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US2303931A
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US2305032A
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US2299893A
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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) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |