US2078088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of recovering sulphuric acid from sulphuric acid solutions of sulphates
Assignee: MANTIUS
•
Filing: 1935-11-22
•
Granted: 1937-04-20
•
Expires: 1955-11-22
Abstract
No abstract record available.
Inventors
- 👤 Mantius Otto
- 👤 Mantius Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:59
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/36; 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) | 1940-04-19 | 1940-10-19 | 1941-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-04-19 | 1944-10-19 | 1945-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-04-19 | 1948-10-19 | 1949-04-20 | $7700.00 | Window Closed / Lapsed |