US1844407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat conducting tube
Assignee: METROPOLITAN ENGINEERING Corp
•
Filing: 1924-05-23
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Granted: 1932-02-09
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Expires: 1944-05-23
Abstract
No abstract record available.
Inventors
- 👤 Murray Joseph Bradley
- 👤 Jr Thomas E Murray
- 👤 John F Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:58
CPC Classifications
F; F23; F23M; F23M5/00; F23M5/08; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/101; F22B37/102
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) | 1935-02-08 | 1935-08-10 | 1936-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-02-08 | 1939-08-10 | 1940-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-02-08 | 1943-08-10 | 1944-02-09 | $7700.00 | Window Closed / Lapsed |