US2522905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporator
Assignee: Individual
•
Filing: 1945-08-17
•
Granted: 1950-09-19
•
Expires: 1965-08-17
Abstract
No abstract record available.
Inventors
- 👤 Charles W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:54
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04; C01D1/28; D; D21; D21C; D21C11/00; D21C11/10; D21C11/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US108793A
Cited
US462102A
Cited
US536785A
Cited
US1297496A
Cited
US1228855A
Cited
US1481723A
Cited
US1521277A
Cited
US1961351A
Cited
GB351328A
Cited
US2099667A
Cited
US2403211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |