Patent US20040103444A1 successfully refreshed from Google Patents.
US3248604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel ignition system preventing radio frequency interference
Assignee: Individual
•
Filing: 1962-01-09
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Granted: 1966-04-26
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Expires: 1982-01-09
Abstract
No abstract record available.
Inventors
- 👤 James R Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:46
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN AN IGNITION DEVICE FOR AN INTERNAL COMBUSTION ENGINE, A METALLIC SHELL, AN ARCING DEVICE SECURED IN ONE END OF SAID SHELL AND INCLUDING AN ELECTRODE BASE GROUNDED TO SAID SHELL AND A CENTRAL INSULATED ELECTRODE FORMING A SPARK GAP WITH SAID BASE, A CONDENSER, A RESISTOR, A TRANSISTOR SWITCH, AND A TRANSFORMER INCLUDING PRIMARY AND SECONDARY WINDINGS, ALL FIXED WITHIN THE OTHER END OF SAID SHELL, ONE TERMINAL EACH OF SAID WINDINGS AND CONDENSER BEING GROUNDED TO SAID SHELL, FIRST AND SECOND INSULATED CONTACTS FIXED WITH SAID SHELL, SAID FIRST CONTACT BEING CONNECTED WITH ONE TERMINAL OF SAID RESISTOR, THE REMAINING TERMINALS OF SAID CONDENSER AND RESISTOR BEING CONNECTED WITH SAID SWITCH, SAID SECOND CONTACT BEING CONNECTED WITH THE TRIGGERING ELEMENT OF SAID SWITCH, AND MEANS CONNECTING THE REMAINING TERMINAL OF SAID SECONDARY WINDING WITH SAID INSULATED ELECTRODE.
Claim 2
Dependent Claim
139 words
IN AN IGNITION DEVICE FOR AN INTERNAL COMBUSTION ENGINE, A METALLIC SHELL, AN ARCING DEVICE SECURED IN ONE END OF SAID SHELL AND INCLUDING AN ELECTRODE BASE GROUNDED TO SAID SHELL AND A CENTRAL INSULATED ELECTRODE FORMING A SPARK GAP WITH SAID BASE, A CONDENSER, A RESISTOR, A TRANSISTOR SWITCH, AND A TRANSFORMER INCLUDING PRIMARY AND SECONDARY WINDINGS, ALL FIXED WITHIN THE OTHER END OF SAID SHELL, ONE TERMINAL EACH OF SAID WINDINGS AND CONDENSER BEING GROUNDED TO SAID SHELL, FIRST AND SECOND INSULATED CONTACTS FIXED WITH SAID SHELL, SAID FIRST CONTACT BEING CONNECTED WITH ONE TERMINAL OF SAID RESISTOR, THE REMAINING TERMINALS OF SAID CONDENSER AND RESISTOR BEING CONNECTED WITH SAID SWITCH, SAID SECOND CONTACT BEING CONNECTED WITH THE TRIGGERING ELEMENT OF SAID SWITCH, AND MEANS CONNECTING THE REMAINING TERMINAL OF SAID SECONDARY WINDING WITH SAID INSULATED ELECTRODE.
References Cited (Backward Citations)
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |