US2348328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and apparatus for treating sulphuric acid containing dissolved nitro bodies
Assignee: EIDP Inc
•
Filing: 1941-01-10
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Granted: 1944-05-09
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Expires: 1961-01-10
Abstract
No abstract record available.
Inventors
- 👤 Chapman Fred Francis
- 👤 Peterson Ralph Francis
- 👤 Woodbury Clifford Akeley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:34
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/94; Y; Y10; Y10S; Y10S159/00; Y10S159/19
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) | 1947-05-09 | 1947-11-08 | 1948-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-05-09 | 1951-11-08 | 1952-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-05-09 | 1955-11-08 | 1956-05-09 | $7700.00 | Window Closed / Lapsed |