US2656157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer element supported against external or internal pressures
Assignee: Individual
•
Filing: 1950-02-16
•
Granted: 1953-10-20
•
Expires: 1970-02-16
Abstract
No abstract record available.
Inventors
- 👤 Eugene W Wasielewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:06
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US945130A
Cited
US930341A
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US1633663A
Cited
US2042618A
Cited
US2063441A
Cited
US1809915A
Cited
US1931679A
Cited
US2325583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |