Patent US2952308A successfully refreshed from Google Patents.
US2952308A
Expired / Lapsed
US
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Electrical ignition and safety systems for burners
Assignee: American Infra Red Radiant Co Inc
•
Filing: 1955-10-10
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Granted: 1960-09-13
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Expires: 1975-10-10
Abstract
No abstract record available.
Inventors
- 👤 Treu Rheinisch-Westfa Revision
- 👤 Franken Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:14
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23D; F23D11/00; F23D11/36; F23D11/42; F23Q; F23Q9/00; F23Q9/08; F23Q9/12; F23N2239/00; F23N2239/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1985991A
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US2196443A
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US2295876A
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US2399673A
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US2417341A
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US2497663A
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US2722270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |