US3106689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical filter for direct current circuit
Assignee: BBC Brown Boveri AG Germany
•
Filing: 1960-10-24
•
Granted: 1963-10-08
•
Expires: 1980-10-24
Abstract
No abstract record available.
Inventors
- 👤 Rollig Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:55
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN AN ELECTRIC FILTER FOR DIRECT CURRENT CIRCUITS COMPRISING AT LEAST ONE CAPACITANCE ELEMENT CONNECTED IN PARALLEL WITH SAID CIRCUIT, THE IMPROVEMENT WHEREIN AN AUXILIARY DIRECT CURRENT VOLTAGE SOURCE IS CONNECTED IN SERIES WITH THE CAPACITANCE ELEMENT, SAID AUXILIARY VOLTAGE SOURCE BEING ARRANGED IN OPPOSITION TO THE DIRECT CURRENT INPUT VOLTAGE APPLIED TO THE FILTER FOR FILTERING WHEREBY THE VOLTAGE TO WHICH SAID CAPACITANCE IS SUBJECTED IS SMALLER THAN SAID INPUT VOLTAGE.
Claim 2
Dependent Claim
72 words
IN AN ELECTRIC FILTER FOR DIRECT CURRENT CIRCUITS COMPRISING AT LEAST ONE CAPACITANCE ELEMENT CONNECTED IN PARALLEL WITH SAID CIRCUIT, THE IMPROVEMENT WHEREIN AN AUXILIARY DIRECT CURRENT VOLTAGE SOURCE IS CONNECTED IN SERIES WITH THE CAPACITANCE ELEMENT, SAID AUXILIARY VOLTAGE SOURCE BEING ARRANGED IN OPPOSITION TO THE DIRECT CURRENT INPUT VOLTAGE APPLIED TO THE FILTER FOR FILTERING WHEREBY THE VOLTAGE TO WHICH SAID CAPACITANCE IS SUBJECTED IS SMALLER THAN SAID INPUT VOLTAGE.
References Cited (Backward Citations)
US2751548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |