Patent US3241133A successfully refreshed from Google Patents.
US3241133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital to analog voltage converter
Assignee: RENWEIL IND Inc
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Filing: 1962-11-06
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Granted: 1966-03-15
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Expires: 1982-11-06
Abstract
No abstract record available.
Inventors
- 👤 Peter J Herzl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:25
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/74; H03M1/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A DIGITAL TO ANALOG VOLTAGE CONVERTER COMPRISING, A PLURALITY OF SWITCHING MEANS EACH CONNECTED IN SERIES WITH A WELDING RESISTOR TO FORM A PLURALITY OF SERIES COMBINATIONS, SAID SERIES COMBINATIONS BEING CONNECTED IN PARALLEL TO FORM A LADDER NETWORK, MEANS BIASING SAID SWITCHING DEVICES TO A PREDETERMINED ONE OF THE OPERATING CONDITIONS "ON" OR "OFF", INPUT MEANS FOR SELECTIVELY ENERGIZING SAID SWITCHING MEANS TO THE OPPOSITE ONE OF SAID OPERATING CONDITIONS IN ACCORDANCE WITH A DIGITAL INPUT, A FIRST RESISTOR OF PREDETERMINED VALUE CONNECTED ACROSS SAID LADDER NETWORK, AND A SECOND RESISTOR OF PREDETERMINED VALUE CONNECTED BETWEEN ONE SIDE OF SAID FIRST RESISTOR OF PREDETERMINED VALUE AND ONE TERMINAL OF A SOURCE OF VOLTAGE, THE OTHER TERMINAL OF SAID SOURCE
Claim 2
Dependent Claim
120 words
A DIGITAL TO ANALOG VOLTAGE CONVERTER COMPRISING, A PLURALITY OF SWITCHING MEANS EACH CONNECTED IN SERIES WITH A WELDING RESISTOR TO FORM A PLURALITY OF SERIES COMBINATIONS, SAID SERIES COMBINATIONS BEING CONNECTED IN PARALLEL TO FORM A LADDER NETWORK, MEANS BIASING SAID SWITCHING DEVICES TO A PREDETERMINED ONE OF THE OPERATING CONDITIONS "ON" OR "OFF", INPUT MEANS FOR SELECTIVELY ENERGIZING SAID SWITCHING MEANS TO THE OPPOSITE ONE OF SAID OPERATING CONDITIONS IN ACCORDANCE WITH A DIGITAL INPUT, A FIRST RESISTOR OF PREDETERMINED VALUE CONNECTED ACROSS SAID LADDER NETWORK, AND A SECOND RESISTOR OF PREDETERMINED VALUE CONNECTED BETWEEN ONE SIDE OF SAID FIRST RESISTOR OF PREDETERMINED VALUE AND ONE TERMINAL OF A SOURCE OF VOLTAGE, THE OTHER TERMINAL OF SAID SOURCE
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |