US2433547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of utilizing heat of waste gases for steam generation
Assignee: Individual
•
Filing: 1944-04-19
•
Granted: 1947-12-30
•
Expires: 1964-04-19
Abstract
No abstract record available.
Inventors
- 👤 Dalin David
- 👤 Hagby Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:59
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1869
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US226405A
Cited
US1151676A
Cited
US1151831A
Cited
US1927095A
Cited
US1839125A
Cited
US1759718A
Cited
GB493443A
Cited
US2358358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |