US3227890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parametric oscillator
Assignee: RCA Corp
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Filing: 1960-12-22
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Granted: 1966-01-04
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Expires: 1980-12-22
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Lo
- 👤 Lubomyr S Onyshkevych
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:51
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/45; H03K3/47; H03B; H03B19/00; H03B19/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE COMBINATION COMPRISING: A FIRST, INSULATED CONDUCTOR, A THIN RIBBON OF HIGH PERMEABILITY MATERIAL WOUND HELICALLY AROUND SAID INSULATED CONDUCTOR WITH ADJACENT TURNS OF SAID RIBBON BEING SPACED APART FROM EACH OTHER, THE HELICALLY WOUND RIBBON HAVING A SUBSTANTIALLY "S" TYPE B-H CHARACTERISTIC, A SECOND CONDUCTOR WOUND AROUND SAID INSULATED CONDUCTOR AND SAID RIBBON, MEANS FOR APPLYING TO ONE OF THE FIRST AND SECOND, CONDUCTORS A.C. SIGNALS HAVING A FREQUENCY F, AND MEANS CONNECTED TO THE OTHER OF THE FIRST AND SECOND CONDUCTORS TO FORM A CIRCUIT RESONANT AT A FREQUENCY CLOSE TO A SUBHARMONIC OF SAID FREQUENCY F.
Claim 2
Dependent Claim
99 words
THE COMBINATION COMPRISING: A FIRST, INSULATED CONDUCTOR, A THIN RIBBON OF HIGH PERMEABILITY MATERIAL WOUND HELICALLY AROUND SAID INSULATED CONDUCTOR WITH ADJACENT TURNS OF SAID RIBBON BEING SPACED APART FROM EACH OTHER, THE HELICALLY WOUND RIBBON HAVING A SUBSTANTIALLY "S" TYPE B-H CHARACTERISTIC, A SECOND CONDUCTOR WOUND AROUND SAID INSULATED CONDUCTOR AND SAID RIBBON, MEANS FOR APPLYING TO ONE OF THE FIRST AND SECOND, CONDUCTORS A.C. SIGNALS HAVING A FREQUENCY F, AND MEANS CONNECTED TO THE OTHER OF THE FIRST AND SECOND CONDUCTORS TO FORM A CIRCUIT RESONANT AT A FREQUENCY CLOSE TO A SUBHARMONIC OF SAID FREQUENCY F.
References Cited (Backward Citations)
US3051891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |