US3230430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable capacitor
Assignee: Individual
•
Filing: 1960-05-24
•
Granted: 1966-01-18
•
Expires: 1980-05-24
Abstract
No abstract record available.
Inventors
- 👤 Llewellyn T Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:33
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A CAPACITOR COMPRISING A CASING HAVING AN INTERNAL SHAPING SURFACE, AN ARBOR EXTENDING INTO THE INTERIOR OF SAID CASING AND HAVING AN EXTERNAL SHAPING SURFACE, MEANS ASSEMBLING SAID CASING AND SAID ARBOR FOR RELATIVE ROTATION ABOUT AN AXIS; AND SHAPING SURFACES HAVING DIFFERENTLY SHAPED CROSS-SECTION IN A PLANE PERPENDICULAR TO SAID AXIS, ONE OF SAID SHAPING SURFACES BEING OVAL SHAPED, A RESILIENTLY DEFORMABLE CAPACITOR SANDWICH COILED WITHIN SAID CASING AND ABOUT SAID ARBOR ARRANGED TO EXPAND AGAINST SAID CASING AND TERMINATING IN OPPOSITE ENDS AD-
Claim 2
Dependent Claim
85 words
A CAPACITOR COMPRISING A CASING HAVING AN INTERNAL SHAPING SURFACE, AN ARBOR EXTENDING INTO THE INTERIOR OF SAID CASING AND HAVING AN EXTERNAL SHAPING SURFACE, MEANS ASSEMBLING SAID CASING AND SAID ARBOR FOR RELATIVE ROTATION ABOUT AN AXIS; AND SHAPING SURFACES HAVING DIFFERENTLY SHAPED CROSS-SECTION IN A PLANE PERPENDICULAR TO SAID AXIS, ONE OF SAID SHAPING SURFACES BEING OVAL SHAPED, A RESILIENTLY DEFORMABLE CAPACITOR SANDWICH COILED WITHIN SAID CASING AND ABOUT SAID ARBOR ARRANGED TO EXPAND AGAINST SAID CASING AND TERMINATING IN OPPOSITE ENDS AD-
References Cited (Backward Citations)
US1385379A
Cited
US1551661A
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US2350823A
Cited
US2673624A
Cited
US2759569A
Cited
US2944199A
Cited
US2984776A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |