US3428568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cation exchange process
Assignee: Johns Manville Corp
•
Filing: 1963-12-18
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Granted: 1969-02-18
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Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Robert I Harker
- 👤 Joseph P Pellicane Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:56
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
THE METHOD OF REMOVING RADIOACTIVE CATIONS FROM RADIATION CONTAMINATED AQUEOUS MEDIA COMRISING INTIMATELY CONTACTING THE RADIATION CONTAMINATED AQUEOUS MEDIA CONTAINING RADIOACTIVE CATIONS WITH A CATION EXCHANGE MEDIUM CONSISTING ESSENTIALLY OF MINERAL LOUGHLINITE.
Claim 2
Independent Claim
32 words
THE METHOD OF REMOVING RADIOACTIVE CATIONS FROM RADIATION CONTAMINATED AQUEOUS MEDIA COMRISING INTIMATELY CONTACTING THE RADIATION CONTAMINATED AQUEOUS MEDIA CONTAINING RADIOACTIVE CATIONS WITH A CATION EXCHANGE MEDIUM CONSISTING ESSENTIALLY OF MINERAL LOUGHLINITE.
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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |