US3454493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and product for removing colloidal materials from aqueous media
Assignee: Rohm and Haas Co
•
Filing: 1966-08-01
•
Granted: 1969-07-08
•
Expires: 1986-08-01
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Kun
- 👤 Robert Kunin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:44
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE METHOD OF REMOVING PARTICULATE MATTER FROM AN AQUEOUS MEDIUM, INCLUDING COLLOIDAL SILICA AND HYDROUS METAL OXIDES, WHICH COMPRISES INTIMATELY CONTACTING THE AQUEOUS MEDIUM WITH ANION EXCHANGE RESINS HAVING A MACRORETICULAR STRUCTURE AND FURTHER HAVING AVERAGE PORE DIAMETERS WHICH ARE WITHIN THE RANGE OF FROM ABOUT 10,000 TO ABOUT 500,000 ANGSTROMS.
Claim 2
Independent Claim
51 words
THE METHOD OF REMOVING PARTICULATE MATTER FROM AN AQUEOUS MEDIUM, INCLUDING COLLOIDAL SILICA AND HYDROUS METAL OXIDES, WHICH COMPRISES INTIMATELY CONTACTING THE AQUEOUS MEDIUM WITH ANION EXCHANGE RESINS HAVING A MACRORETICULAR STRUCTURE AND FURTHER HAVING AVERAGE PORE DIAMETERS WHICH ARE WITHIN THE RANGE OF FROM ABOUT 10,000 TO ABOUT 500,000 ANGSTROMS.
References Cited (Backward Citations)
CA625753A
Cited
US2962438A
Cited
GB860695A
Cited
US3147214A
Cited
GB932125A
Cited
GB932126A
Cited
US3147215A
Cited
GB932375A
Cited
US3267073A
Cited
US3367889A
Cited
US3322695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |