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US2227291A
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Safety system responsive to temperature and fluid flow
Assignee: CHICAGO BY PRODUCTS CORP
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Filing: 1938-05-26
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Granted: 1940-12-31
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Expires: 1958-05-26
Abstract
No abstract record available.
Inventors
- 👤 Robert A Wittmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:15
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/025; F23N2233/00; F23N2233/10
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) | 1943-12-31 | 1944-07-01 | 1944-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-31 | 1948-07-01 | 1948-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-31 | 1952-07-01 | 1952-12-31 | $7700.00 | Window Closed / Lapsed |