Patent US2759259A successfully refreshed from Google Patents.
Patent US3249856A successfully refreshed from Google Patents.
US3249856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetometers for measuring the earth magnetic field and its variations
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
•
Filing: 1963-12-27
•
Granted: 1966-05-03
•
Expires: 1983-12-27
Abstract
No abstract record available.
Inventors
- 👤 Lemaire Henri
- 👤 Rassat Andre
- 👤 Salvi Antoine
- 👤 Briere Roselyne
- 👤 Dupeyre Rose-Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:07
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN A MAGNETOMETER FOR MEASURING THE EARTH MAGNETIC FIELD AND ITS VARIATIONS, OF THE TYPE INCLUDING A SOLUTION WHICH COMPRISES A SOLVENT WITH ATOMIC NUCLEI HAVING NON-ZERO MAGNETIC MOMENT AND, DISSOLVED IN SAID SOLVENT, A FREE RADICAL HAVING UNPAIRED ELECTRONS, THE IMPROVEMENT CONSISTING IN CONSTITUTING SAID FREE RADICAL BY AN ORGANIC FREE RADIAL COMPRISING A NITROXIDE LINKED TO TWO CARBON ATOM OF WHICH IS FURTHER EXCLUSIVELY LINKED TO TWO CARBON ATOMS EACH LINKED WITH THREE OTHER CARBON ATOMS.
Claim 2
Dependent Claim
78 words
IN A MAGNETOMETER FOR MEASURING THE EARTH MAGNETIC FIELD AND ITS VARIATIONS, OF THE TYPE INCLUDING A SOLUTION WHICH COMPRISES A SOLVENT WITH ATOMIC NUCLEI HAVING NON-ZERO MAGNETIC MOMENT AND, DISSOLVED IN SAID SOLVENT, A FREE RADICAL HAVING UNPAIRED ELECTRONS, THE IMPROVEMENT CONSISTING IN CONSTITUTING SAID FREE RADICAL BY AN ORGANIC FREE RADIAL COMPRISING A NITROXIDE LINKED TO TWO CARBON ATOM OF WHICH IS FURTHER EXCLUSIVELY LINKED TO TWO CARBON ATOMS EACH LINKED WITH THREE OTHER CARBON ATOMS.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |