Patent US2356283A successfully refreshed from Google Patents.
US2356283A
Expired / Lapsed
US
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Low-water alarm for boilers
Assignee: Pennsylvania Railroad Co
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Filing: 1943-05-29
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Granted: 1944-08-22
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Expires: 1963-05-29
Abstract
No abstract record available.
Inventors
- 👤 Carleton K Steins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:27
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/42; F22B37/47; F22B37/475
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) | 1947-08-22 | 1948-02-21 | 1948-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-22 | 1952-02-21 | 1952-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-22 | 1956-02-21 | 1956-08-22 | $7700.00 | Window Closed / Lapsed |