US2619404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing potassium salts from solutions, particularly sea water, salt lakes, and salt lyes
Assignee: Norsk Hydro Elektrisk Kvaelstof AS
•
Filing: 1945-10-22
•
Granted: 1952-11-25
•
Expires: 1965-10-22
Abstract
No abstract record available.
Inventors
- 👤 Skogseid Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:04
CPC Classifications
C; C01; C01D; C01D17/00; C01D17/003; C08; C08F; C08F112/00; C08F112/02; C08F112/04; C08F112/14; C08F112/26; C08F112/28; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
IN A PROCESS FOR THE PRODUCTION OF POTASSIUM COMPOUNDS FROM POTASSIUM-CONTAINING SOLUTIONS BY MEANS OF ION EXCHANGERS, THE STEP WHICH COMPRISES CONDUCTING THE SOLUTION THROUGH AN ION EXCHANGER COMPRISING METAL COMPOUNDS OF POLYVINYL-PENTANITRO-DIPHENYLAMINE.
Claim 2
Dependent Claim
33 words
IN A PROCESS FOR THE PRODUCTION OF POTASSIUM COMPOUNDS FROM POTASSIUM-CONTAINING SOLUTIONS BY MEANS OF ION EXCHANGERS, THE STEP WHICH COMPRISES CONDUCTING THE SOLUTION THROUGH AN ION EXCHANGER COMPRISING METAL COMPOUNDS OF POLYVINYL-PENTANITRO-DIPHENYLAMINE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |