US3330941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oven temperature control
Assignee: Beckman Coulter Inc
•
Filing: 1960-02-12
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Granted: 1967-07-11
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Expires: 1980-02-12
Abstract
No abstract record available.
Inventors
- 👤 Duca Anthony Del
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:23
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN AN OVEN, THE COMBINATION OF: AN ENCLOSED CHAMBER; A SOURCE OF A.C. VOLTAGE HAVING FIRST AND SECOND END TERMINALS AND AN INTERMEDIATE TERMINAL; A TRANSISTOR POSITIONED WITHIN SAID CHAMBER AND HAVING A COLLECTOR ELEMENT, AN EMITTER ELEMENT AND A BASE, WITH SAID ELEMENTS CONNECTED ACROSS SAID INTERMEDIATE AND FIRST TERMINALS OF SAID SOURCE; A RECTIFIER UNIT CONNECTED IN SERIES WITH SAID COLLECTOR ELEMENT FOR UNIDIRECTIONAL CURRENT IN SAID TRANSISTOR; A FIRST RESISTOR CONNECTED ACROSS SAID FIRST TERMINAL AND SAID TRANSISTOR BASE; AND A SECOND RESISTOR CONNECTED ACROSS SAID SECOND TERMINAL AND SAID
Claim 2
Dependent Claim
93 words
IN AN OVEN, THE COMBINATION OF: AN ENCLOSED CHAMBER; A SOURCE OF A.C. VOLTAGE HAVING FIRST AND SECOND END TERMINALS AND AN INTERMEDIATE TERMINAL; A TRANSISTOR POSITIONED WITHIN SAID CHAMBER AND HAVING A COLLECTOR ELEMENT, AN EMITTER ELEMENT AND A BASE, WITH SAID ELEMENTS CONNECTED ACROSS SAID INTERMEDIATE AND FIRST TERMINALS OF SAID SOURCE; A RECTIFIER UNIT CONNECTED IN SERIES WITH SAID COLLECTOR ELEMENT FOR UNIDIRECTIONAL CURRENT IN SAID TRANSISTOR; A FIRST RESISTOR CONNECTED ACROSS SAID FIRST TERMINAL AND SAID TRANSISTOR BASE; AND A SECOND RESISTOR CONNECTED ACROSS SAID SECOND TERMINAL AND SAID
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |