US2374745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure steam preheater roll
Assignee: Henry Pratt Co LLC
•
Filing: 1944-03-03
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Granted: 1945-05-01
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Expires: 1964-03-03
Abstract
No abstract record available.
Inventors
- 👤 Carl W Grimm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:37
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/36; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/156
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) | 1948-04-30 | 1948-10-30 | 1949-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-30 | 1952-10-30 | 1953-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-30 | 1956-10-30 | 1957-05-01 | $7700.00 | Window Closed / Lapsed |