US2575723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical flue boiler
Assignee: Individual
•
Filing: 1948-06-18
•
Granted: 1951-11-20
•
Expires: 1968-06-18
Abstract
No abstract record available.
Inventors
- 👤 Benedict W Mandelburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:11
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1696206A
Cited
US365934A
Cited
US399975A
Cited
US181609A
Cited
US820932A
Cited
US822607A
Cited
US872612A
Cited
US1448850A
Cited
US1462018A
Cited
GB235643A
Cited
US1944506A
Cited
US1981895A
Cited
US2119606A
Cited
US2229686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |