US3200252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of radioactivity on paper chromatograms
Assignee: ECKHOFF
•
Filing: 1962-07-09
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Granted: 1965-08-10
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Expires: 1982-07-09
Abstract
No abstract record available.
Inventors
- 👤 Moses Vivian
- 👤 Lonberg-Holm Knud Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:21
CPC Classifications
G; G01; G01T; G01T7/00; G01T7/02; G01T7/04; G01N; G01N30/00; G01N30/90; G01N30/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
APPARATUS FOR AUTOMATICALLY MEASURING THE RADIOACTIVITY OF A PLURALITY OF PAPER CHROMATOGRAM SEGMENTS COMPRISING, IN COMBINATION, A PAIR OF PARALLEL ROTATABLE SPOOLS SPACED APART AND CARRYING A THIN FILM STRIP WHICH HAS SAID CHROMATOGRAM SEGMENTS MOUNTED THEREON AT SPACED INTERVALS THEREALONG AND WHICH IS WOUND ON SAID SPOOLS TOGETHER WITH A LIKE STRIP OF RELATIVELY HIGH STRENGTH BACKING MATERIAL, A FIRST SET OF GUIDE ROLLERS DISPOSED BETWEEN SAID SPOOLS FOR DIRECTING SAID THIN FILM STRIP THEREBETWEEN, A SECOND SET OF GUIDE ROLLERS SPACED APART FROM THE FIRST SET THEREOF FOR DIRECTING SAID BACKING STRIP BETWEEN SAID SPOOLS ALONG A PATH SPACED APART AND PARALLEL TO THAT OF SAID THIN FILM, A PAIR OF ADJACENT RADIATION COUNTERS DISPOSED ONE ON EACH SIDE OF SAID THIN FILM STRIP, DRIVE MEANS OPERATIVELY COUPLED TO SAID SPOOLS, AND CONTROL MEANS STOPPING SAID SPOOL DRIVE MEANS AS EACH OF SAID CHROMATOGRAM SEGMENTS MOVES BETWEEN SAID RADIATION COUNTERS SAND STARTING SAID DRIVE MEANS AFTER SAID COUNTERS HAVE MEASURED THE RADIOACTVITY OF EACH OF SAID SEGMENTS FOR A PRE-DETERMINED INTERVAL.
Claim 2
Dependent Claim
173 words
APPARATUS FOR AUTOMATICALLY MEASURING THE RADIOACTIVITY OF A PLURALITY OF PAPER CHROMATOGRAM SEGMENTS COMPRISING, IN COMBINATION, A PAIR OF PARALLEL ROTATABLE SPOOLS SPACED APART AND CARRYING A THIN FILM STRIP WHICH HAS SAID CHROMATOGRAM SEGMENTS MOUNTED THEREON AT SPACED INTERVALS THEREALONG AND WHICH IS WOUND ON SAID SPOOLS TOGETHER WITH A LIKE STRIP OF RELATIVELY HIGH STRENGTH BACKING MATERIAL, A FIRST SET OF GUIDE ROLLERS DISPOSED BETWEEN SAID SPOOLS FOR DIRECTING SAID THIN FILM STRIP THEREBETWEEN, A SECOND SET OF GUIDE ROLLERS SPACED APART FROM THE FIRST SET THEREOF FOR DIRECTING SAID BACKING STRIP BETWEEN SAID SPOOLS ALONG A PATH SPACED APART AND PARALLEL TO THAT OF SAID THIN FILM, A PAIR OF ADJACENT RADIATION COUNTERS DISPOSED ONE ON EACH SIDE OF SAID THIN FILM STRIP, DRIVE MEANS OPERATIVELY COUPLED TO SAID SPOOLS, AND CONTROL MEANS STOPPING SAID SPOOL DRIVE MEANS AS EACH OF SAID CHROMATOGRAM SEGMENTS MOVES BETWEEN SAID RADIATION COUNTERS SAND STARTING SAID DRIVE MEANS AFTER SAID COUNTERS HAVE MEASURED THE RADIOACTVITY OF EACH OF SAID SEGMENTS FOR A PRE-DETERMINED INTERVAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |