US3062738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Granular ion exchange process for pulp treatment
Assignee: Consolidated Gold Fields of South Africa Ltd
•
Filing: 1959-01-13
•
Granted: 1962-11-06
•
Expires: 1979-01-13
Abstract
No abstract record available.
Inventors
- 👤 Frank O Read
- 👤 Ernest H D Carman
- 👤 Harry E Cross
- 👤 Moir Alexander Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:16
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/10; Y; Y10; Y10S; Y10S210/00; Y10S210/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
AN ION EXCHANGE PROCESS CONSISTING IN MIXING A PULP WITH A GRANULAR ION EXCHANGE MATERIAL HAVING A SPECIFIC GRAVITY LESS THAN THAT OF THE PULP, ALLOWING THE MIXTURE TO SEPARATE INTO FRACTIONS AND REMOVING THE LIGHTER FRACTION OF THE SEPARATED MIXTURE CONTAINING THE ION EXCHANGE MATERIAL.
Claim 2
Dependent Claim
46 words
AN ION EXCHANGE PROCESS CONSISTING IN MIXING A PULP WITH A GRANULAR ION EXCHANGE MATERIAL HAVING A SPECIFIC GRAVITY LESS THAN THAT OF THE PULP, ALLOWING THE MIXTURE TO SEPARATE INTO FRACTIONS AND REMOVING THE LIGHTER FRACTION OF THE SEPARATED MIXTURE CONTAINING THE ION EXCHANGE MATERIAL.
References Cited (Backward Citations)
US2742381A
Cited
GB780406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |