US2501518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser
Assignee: Niagara Blower Co
•
Filing: 1945-10-22
•
Granted: 1950-03-21
•
Expires: 1965-10-22
Abstract
No abstract record available.
Inventors
- 👤 Horton Ralph
- 👤 Martin H Olstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:36
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/04; F25B2339/00; F25B2339/04; F25B2339/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US752999A
Cited
US1458899A
Cited
US2113635A
Cited
US2166397A
Cited
US2155051A
Cited
US2149358A
Cited
US2238808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |