US2219726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activated magnesia and method of making
Assignee: WESTVACO CHLORINE PRODUCTS COR
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Filing: 1940-01-06
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Granted: 1940-10-29
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Expires: 1960-01-06
Abstract
No abstract record available.
Inventors
- 👤 Max Y Seaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:42
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/02; C01F5/06; C01F5/08; B; B01; B01J; B01J20/00; B01J20/02; B01J20/04; B01J20/041; B01J20/30; B01J20/3078
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) | 1943-10-29 | 1944-04-29 | 1944-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-29 | 1948-04-29 | 1948-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-29 | 1952-04-29 | 1952-10-29 | $7700.00 | Window Closed / Lapsed |