US2053834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the simultaneous production of sulphuric and nitric acids
Assignee: Individual
•
Filing: 1932-11-09
•
Granted: 1936-09-08
•
Expires: 1952-11-09
Abstract
No abstract record available.
Inventors
- 👤 Kachkaroff Pierre
- 👤 Matignon Camille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:45
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/82; C01B21/00; C01B21/082; C01B21/086; C01B21/20; C01B21/24; C01B21/26
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) | 1939-09-08 | 1940-03-09 | 1940-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-09-08 | 1944-03-09 | 1944-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-09-08 | 1948-03-09 | 1948-09-08 | $7700.00 | Window Closed / Lapsed |