Patent US3267401A successfully refreshed from Google Patents.
US3267401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable inductor
Assignee: General Dynamics Corp
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Filing: 1965-10-22
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Granted: 1966-08-16
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Hotine William
- 👤 Stephen W Babcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:34
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A VARIABLE INDUCTOR COMPRISING: A MAGNETIC SHIELDING CYLINDER COATED ON THE INTERNAL SURFACE THEREOF WITH A SUITABLE DIELECTRIC, SAID DIELECTRIC COATING BEING PROVIDED WITH THREADS ON THE INTERNAL SURFACE THEREOF, A HELICOIL HAVING TURNS MATCHING SAID THREADS AND A RADIALLY DEFORMED LOCKING TURN, SAID HELICOIL BEING OPERATIVELY POSITIONED AT LEAST PARTIALLY WITHIN SAID CYLINDER, AND A TUNING SLUG HAVING THREADS THEREON WHICH COOPERATE WITH THE TURNS OF SAID HELICOIL, WHEREBY SAID TUNING SLUG IS ADJUSTABLY
Claim 2
Dependent Claim
75 words
A VARIABLE INDUCTOR COMPRISING: A MAGNETIC SHIELDING CYLINDER COATED ON THE INTERNAL SURFACE THEREOF WITH A SUITABLE DIELECTRIC, SAID DIELECTRIC COATING BEING PROVIDED WITH THREADS ON THE INTERNAL SURFACE THEREOF, A HELICOIL HAVING TURNS MATCHING SAID THREADS AND A RADIALLY DEFORMED LOCKING TURN, SAID HELICOIL BEING OPERATIVELY POSITIONED AT LEAST PARTIALLY WITHIN SAID CYLINDER, AND A TUNING SLUG HAVING THREADS THEREON WHICH COOPERATE WITH THE TURNS OF SAID HELICOIL, WHEREBY SAID TUNING SLUG IS ADJUSTABLY
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |