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US2547822A
Expired / Lapsed
US
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Fumigant composition of activated silica gel and dihalo-alkene
Assignee: Dow Chemical Co
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Filing: 1947-09-06
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Granted: 1951-04-03
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Expires: 1967-09-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Julius E Johnson
- 👤 Dorsey R Mussell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:31
CPC Classifications
A; A01; A01N; A01N29/00; A01N29/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |