Patent US3149293A successfully refreshed from Google Patents.
US3149293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic timer or pulse time modulator
Assignee: Dynamic Controls HS Inc
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Filing: 1960-10-19
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Granted: 1964-09-15
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Expires: 1980-10-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Farkas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:49
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K3/00; H03K3/02; H03K3/35; H03K3/351
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
IN A TEMPERATURE RESPONSIVE ELECTRONIC TIMER, THE COMBINATION OF: A LOW AND SUBSTANTIALLY CONSTANT FREQUENCY SAW-TOOTH GENERATOR, A SIGNAL GENERATOR INCLUDING A TEMPERATURE SENSITIVE MEANS AND WHICH IS OPERABLE TO PROVIDE A SUBSTANTIALLY LINEAR DIRECT CURRENT SIGNAL VOLTAGE PROPORTIONAL TO A SENSED TEMPERATURE, A THREE TERMINAL TRANSISTOR HAVING A FIRST TERMINAL CONNECTED IN CIRCUIT WITH SAID SAW-TOOTH GENERATOR AND A SECOND TERMINAL CONNECTED IN CIRCUIT WITH SAID SIGNAL GENERATOR SO AS TO PROVIDE AN OUTPUT SIGNAL AT ITS THIRD TERMINAL IN THE FORM OF A SERIES OF DISCRETE PULSES RISING AT EQUAL INTERVALS OF TIME AND EACH OF A DURATION PROPORTIONAL TO SAID SIGNAL VOLTAGE, AND
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |