US2302807A
Expired / Lapsed
US
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Apparatus for treating gases
Assignee: Davison Chemical Corp
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Filing: 1940-03-06
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Granted: 1942-11-24
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Expires: 1960-03-06
Abstract
No abstract record available.
Inventors
- 👤 Shoeld Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:31
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1423; F24F2203/00; F24F2203/10; F24F2203/1032; F24F2203/1036; F24F2203/1048; F24F2203/1052; F24F2203/1056; F24F2203/1064; F24F2203/1068; F24F2203/1084; F24F2203/1096
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) | 1945-11-23 | 1946-05-25 | 1946-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-11-23 | 1950-05-25 | 1950-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-11-23 | 1954-05-25 | 1954-11-24 | $7700.00 | Window Closed / Lapsed |