Patent US4532218A successfully refreshed from Google Patents.
US4532218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identification of carbon-containing ions adsorbed on ion-exchange resins by nuclear magnetic resonance spectroscopy
Assignee: Mobil Oil AS
•
Filing: 1981-06-29
•
Granted: 1985-07-30
•
Expires: 2001-06-29
Abstract
Abstract A process for the detection of carbon-containing ions, particularly uranyl tricarbonate, adsorbed on an ion-exchange resin, comprising introducing a sample of the ion-exchange resin to nuclear magnetic resonance (nmr) spectroscopy.
Inventors
- 👤 E. Thomas Strom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:56
CPC Classifications
G; G01; G01N; G01N24/00; G01N24/08; Y; Y10; Y10T; Y10T436/00; Y10T436/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A process for the identification of a uranyl carbonate adsorbed on an anion-exchange resin and having a nuclear magnetic resonance active nucleus, said process comprising placing an anion-exchange resin suspected of having adsorbed a uranyl carbonate in a nuclear magnetic resonance tube with distilled water and then subjecting the anion-exchange resin in the nuclear magnetic resonance tube to C-13 Fourier transform nuclear magnetic resonance spectroscopic analysis to indicate the presence of a uranyl carbonate adsorbed on said resin.
Claim 2
Dependent Claim
78 words
A process for the identification of a uranyl carbonate adsorbed on an anion-exchange resin and having a nuclear magnetic resonance active nucleus, said process comprising placing an anion-exchange resin suspected of having adsorbed a uranyl carbonate in a nuclear magnetic resonance tube with distilled water and then subjecting the anion-exchange resin in the nuclear magnetic resonance tube to C-13 Fourier transform nuclear magnetic resonance spectroscopic analysis to indicate the presence of a uranyl carbonate adsorbed on said resin.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein said uranyl carbonate is uranyl tricarbonate.
Claim 4
Dependent Claim
13 words
A process according to claim 1 wherein said anion-exchange resin is Dowex 21K.
Claim 5
Dependent Claim
18 words
A process according to claim 1 including the further step of determining the concentration of said carbon-containing ion.
Claim 6
Dependent Claim
29 words
A process according to claim 4 wherein the ion-exchange resin is spiked with a known carbon-containing compound having a nmr active nucleus that does not adsorb on the resin.
References Cited (Backward Citations)
US3420634A
Cited
US3954410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |