US2232501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for gas burners
Assignee: CHICAGO BY PRODUCTS CORP
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Filing: 1938-02-07
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Granted: 1941-02-18
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Expires: 1958-02-07
Abstract
No abstract record available.
Inventors
- 👤 Robert A Wittmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:23
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-02-18 | 1944-08-19 | 1945-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-18 | 1948-08-19 | 1949-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-18 | 1952-08-19 | 1953-02-18 | $7700.00 | Window Closed / Lapsed |