Patent US2855349A successfully refreshed from Google Patents.
US2855349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactive aliphatic compounds
Assignee: Individual
•
Filing: 1955-04-08
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Granted: 1958-10-07
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Expires: 1975-04-08
Abstract
No abstract record available.
Inventors
- 👤 Willard F Libby
- 👤 Ariel G Schrodt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:44
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METOD OF LABELING ALIPHATIC COMPOUNDS WITH RADIOACTIVE CARBON-14 ATOMS COMPRISING IRRADIATING WITHH THERMAL NEUTRONS AN INTIMATE MIXTURE OF A FIRST COMPOUND WHICH IS A SATURATED NORMALLY-LIQUID HYDROCARBON AND A SECOND COMPOUND WHICH IS A NITROGEN-CONTAINING COMPOUND, THE FLUX OF THE RADIATION SOURCE BEING ABOUT 10**1111 NEUTRONS PER CM.2 PER SECOND, THE MIXTURE CONTAINING ABOUT 5 MOLE PERCENT OF THE SECOND COMPOUND IN THE FIRST COMPOUND, AND SEPARATING THE RESULTANT HYDROCARBON LABELED WITH RADIOACTIVE CARBON-14 FROM THE IRRADIATEDD MIXTURE.
Claim 2
Dependent Claim
79 words
A METOD OF LABELING ALIPHATIC COMPOUNDS WITH RADIOACTIVE CARBON-14 ATOMS COMPRISING IRRADIATING WITHH THERMAL NEUTRONS AN INTIMATE MIXTURE OF A FIRST COMPOUND WHICH IS A SATURATED NORMALLY-LIQUID HYDROCARBON AND A SECOND COMPOUND WHICH IS A NITROGEN-CONTAINING COMPOUND, THE FLUX OF THE RADIATION SOURCE BEING ABOUT 10**1111 NEUTRONS PER CM.2 PER SECOND, THE MIXTURE CONTAINING ABOUT 5 MOLE PERCENT OF THE SECOND COMPOUND IN THE FIRST COMPOUND, AND SEPARATING THE RESULTANT HYDROCARBON LABELED WITH RADIOACTIVE CARBON-14 FROM THE IRRADIATEDD MIXTURE.
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |