US2842489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of soda ash
Assignee: Struthers Wells Corp
•
Filing: 1957-03-05
•
Granted: 1958-07-08
•
Expires: 1977-03-05
Abstract
No abstract record available.
Inventors
- 👤 Svanoe Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:58
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/07
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
IN A PROCESS FOR THE CONVERSION OF CELL LIQUOR TO SODA ASH AND CONCENTRATED BRINE THE STEPS WHICH COMPRISE CONVERTING IN THE FIRST STEP SODIUM HYDROXIDE, OF THE CELL LIQUOR FROM THE ELCTROLYSIS OF BRINE, WITH CAR-
References Cited (Backward Citations)
US2383674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |