US2151883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and means for effecting anionic exchanges in solutions
Assignee: Individual
•
Filing: 1935-10-25
•
Granted: 1939-03-28
•
Expires: 1955-10-25
Abstract
No abstract record available.
Inventors
- 👤 Adams Basil Albert
- 👤 Holmes Eric Leighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:28
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/06; C13K1/08; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/06; C08G12/08; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-03-27 | 1942-09-26 | 1943-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-27 | 1946-09-26 | 1947-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-27 | 1950-09-26 | 1951-03-28 | $7700.00 | Window Closed / Lapsed |