US3096591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency leveling device
Assignee: Individual
•
Filing: 1960-06-29
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Granted: 1963-07-09
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Expires: 1980-06-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward F Higgins
- 👤 Daniel H Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:20
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A LEVELING SYSTEM COMPRISING: A SPIRIT LEVEL HAVING A GASEOUS BUBBLE FLOATING IN A DIELECTRIC LIQUID; A FIRST COMMON ELECTRODE ATTACHED TO ONE SIDE OF SAID LEVEL; A SECOND ELECTRODE AND A THIURD ELECTRODE ATTACHED TO THE OPPOSITE SIDE OF SAID LEVEL, SAID COMMON ELECTRODE AND SAID SECOND ELECTRODE FORMING A FIRST CAPACITOR, SAID COMMON ELECTRODE AND SAID THIRD ELECTRODE FORMING A SECOND CAPACITOR, THE ELECTRODES OF SAID CAPACITORS BEING DIFFERENTIALLY DIELECTRICALLY COUPLED BY THE BUBBLE OF SAID SPIRIT LEVEL WHEREIN A MOVEMENT OF SAID BUBBLE IN A FIRST DIRECTION PRODUCES AN INCREASE IN THE CAPACITANCE OF SAID FIRST CAPACITOR AND A DECREASE IN THE CAPACITANCE OF SAID SECOND CAPACITOR AND A MOVEMENT OF SAID BUBBLE IN THE OPPOSITE DIRECTION PRODUCES A DECREASE IN THE CAPACITANCE OF SAID FIRST CAPACITOR AND AN INCREASE IN THE CAPACITANCE OF SAID SECOND CAPACITOR; DETECTION MEANS COUPLED TO SAID
Claim 2
Dependent Claim
145 words
A LEVELING SYSTEM COMPRISING: A SPIRIT LEVEL HAVING A GASEOUS BUBBLE FLOATING IN A DIELECTRIC LIQUID; A FIRST COMMON ELECTRODE ATTACHED TO ONE SIDE OF SAID LEVEL; A SECOND ELECTRODE AND A THIURD ELECTRODE ATTACHED TO THE OPPOSITE SIDE OF SAID LEVEL, SAID COMMON ELECTRODE AND SAID SECOND ELECTRODE FORMING A FIRST CAPACITOR, SAID COMMON ELECTRODE AND SAID THIRD ELECTRODE FORMING A SECOND CAPACITOR, THE ELECTRODES OF SAID CAPACITORS BEING DIFFERENTIALLY DIELECTRICALLY COUPLED BY THE BUBBLE OF SAID SPIRIT LEVEL WHEREIN A MOVEMENT OF SAID BUBBLE IN A FIRST DIRECTION PRODUCES AN INCREASE IN THE CAPACITANCE OF SAID FIRST CAPACITOR AND A DECREASE IN THE CAPACITANCE OF SAID SECOND CAPACITOR AND A MOVEMENT OF SAID BUBBLE IN THE OPPOSITE DIRECTION PRODUCES A DECREASE IN THE CAPACITANCE OF SAID FIRST CAPACITOR AND AN INCREASE IN THE CAPACITANCE OF SAID SECOND CAPACITOR; DETECTION MEANS COUPLED TO SAID
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) | 1966-07-08 | 1967-01-07 | 1967-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-08 | 1971-01-07 | 1971-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-08 | 1975-01-07 | 1975-07-09 | $7700.00 | Window Closed / Lapsed |