US3393038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition systems
Assignee: Texas Instruments Inc
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Filing: 1965-11-08
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Granted: 1968-07-16
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Expires: 1985-11-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Burkhalter
- 👤 Joseph W Waseleski Jr
- 👤 Francis P Buiting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:16
CPC Classifications
F; F23; F23Q; F23Q7/00; F23Q7/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A BURNER CONSTRUCTION INCLUDING VALVE MEANS WHICH WHEN ACTUATED ADMITS A COMBUSTIBLE FUEL INTO THE BURNER, AN IGNITION SYSTEM COMPRISING: A FILAMENT INCLUDING A WIRE CORE OF A MALLEABLE METAL, SAID CORE BEING COATED BY A LAYER OF A MATERIAL THE OXIDES OF WHICH FORM A STABLE FILM WHICH PROTECTS SAID METAL FORM OXIDATION UPON HEATING OF SAID FILAMENT; MEANS FOR APPLYING ELECTRIC CURRENT TO SAID FILAMENT TO HEAT IT TO A TEMPERATURE ABOVE THE IGNITION TEMPERATURE OF SAID FUEL; TIMED SWITCH MEANS FOR ACTUATING SAID VALVE MEANS FOR A PRESELECTED INTERVAL; AND MEANS RESPONSIVE TO BURNING OF SAID FUEL IN SAID BURNER FOR MAINTAINING SAID VALVE MEANS ACTUATED INDEPENDENTLY OF SID TIMED SWITCH MEANS.
Claim 2
Dependent Claim
116 words
IN A BURNER CONSTRUCTION INCLUDING VALVE MEANS WHICH WHEN ACTUATED ADMITS A COMBUSTIBLE FUEL INTO THE BURNER, AN IGNITION SYSTEM COMPRISING: A FILAMENT INCLUDING A WIRE CORE OF A MALLEABLE METAL, SAID CORE BEING COATED BY A LAYER OF A MATERIAL THE OXIDES OF WHICH FORM A STABLE FILM WHICH PROTECTS SAID METAL FORM OXIDATION UPON HEATING OF SAID FILAMENT; MEANS FOR APPLYING ELECTRIC CURRENT TO SAID FILAMENT TO HEAT IT TO A TEMPERATURE ABOVE THE IGNITION TEMPERATURE OF SAID FUEL; TIMED SWITCH MEANS FOR ACTUATING SAID VALVE MEANS FOR A PRESELECTED INTERVAL; AND MEANS RESPONSIVE TO BURNING OF SAID FUEL IN SAID BURNER FOR MAINTAINING SAID VALVE MEANS ACTUATED INDEPENDENTLY OF SID TIMED SWITCH MEANS.
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) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |