US2056929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkaline compounds, sulphuric acid, and other valuable chemicals
Assignee: Brown Co
•
Filing: 1933-05-13
•
Granted: 1936-10-06
•
Expires: 1953-05-13
Abstract
No abstract record available.
Inventors
- 👤 Hugh K Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:22
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04; C01D1/20; C01B; C01B17/00; C01B17/48; C01B17/50; C01D5/00; C01F; C01F11/00; C01F11/02; C01F11/10
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) | 1939-10-06 | 1940-04-06 | 1940-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-10-06 | 1944-04-06 | 1944-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-10-06 | 1948-04-06 | 1948-10-06 | $7700.00 | Window Closed / Lapsed |