US3013958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isotopic labelling
Assignee: —
•
Filing: —
•
Granted: 1961-12-19
•
Expires: 1978-12-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:41
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/10; B01; B01D; B01D59/00; B01D59/44; Y; Y10; Y10S; Y10S422/00; Y10S422/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF SUBSTITUTING ISOTOPIC ATOMS OF AN ELEMENT FOR ATOMS OF THE ELEMENT CONTAINED IN AN ORGANIC SUBSTANCE IN NONGASEOUS FORM, COMPRISING THE STEPS OF ENCLOSING SAID SUBSTANCE TOGETHER WITH A GASEOUS MATERIAL AT REDUCED PRESSURE IN A SEALED CONTAINER, SAID MATERIAL CONTAINING ISOTOPIC ATOMS OF AN ELEMENT CONTAINED IN SAID SUBSTANCE, SAID ISOTOPIC ATOMS BEING RARE IN NATURE AND BEING READILY RECOGNIZABLE, CREATING IN SAID CONTAINER AN ELECTRIC FIELD WHICH WILL IONIZE SAID GAS AND ACCELERATE IONS OF SAID ISOTOPIC ATOMS TOWARD SAID SUBSTANCE, AND MAINTAINING SAID ELECTRIC FIELD IN SAID CONTAINER TO SUBSTITUTE SOME OF SAID ISOTOPIC ATOMS OF THE ELEMENT FROM SAID GASEOUS MATERIAL FOR SOME OF THE ATOMS OF THE ELEMENT IN SAID SUBSTANCE AND TO FIX THE SUBSTITUTED ATOMS THEREIN.
Claim 2
Independent Claim
126 words
THE METHOD OF SUBSTITUTING ISOTOPIC ATOMS OF AN ELEMENT FOR ATOMS OF THE ELEMENT CONTAINED IN AN ORGANIC SUBSTANCE IN NONGASEOUS FORM, COMPRISING THE STEPS OF ENCLOSING SAID SUBSTANCE TOGETHER WITH A GASEOUS MATERIAL AT REDUCED PRESSURE IN A SEALED CONTAINER, SAID MATERIAL CONTAINING ISOTOPIC ATOMS OF AN ELEMENT CONTAINED IN SAID SUBSTANCE, SAID ISOTOPIC ATOMS BEING RARE IN NATURE AND BEING READILY RECOGNIZABLE, CREATING IN SAID CONTAINER AN ELECTRIC FIELD WHICH WILL IONIZE SAID GAS AND ACCELERATE IONS OF SAID ISOTOPIC ATOMS TOWARD SAID SUBSTANCE, AND MAINTAINING SAID ELECTRIC FIELD IN SAID CONTAINER TO SUBSTITUTE SOME OF SAID ISOTOPIC ATOMS OF THE ELEMENT FROM SAID GASEOUS MATERIAL FOR SOME OF THE ATOMS OF THE ELEMENT IN SAID SUBSTANCE AND TO FIX THE SUBSTITUTED ATOMS THEREIN.
References Cited (Backward Citations)
US2855349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |