US2394858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for smoothing furnace walls
Assignee: Individual
•
Filing: 1942-12-09
•
Granted: 1946-02-12
•
Expires: 1962-12-09
Abstract
No abstract record available.
Inventors
- 👤 Charles R Jeffreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:19
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; B; B23; B23Q; B23Q1/00; B23Q1/0009; B23Q1/0018; B24; B24B; B24B23/00; B24B27/00; B24B27/033; B24B27/04; B24B41/00; B24B41/002; F16L15/006; F16L15/008; Y; Y10; Y10S; Y10S29/00; Y10S29/064; Y10S29/081
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) | 1949-02-11 | 1949-08-13 | 1950-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-02-11 | 1953-08-13 | 1954-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-02-11 | 1957-08-13 | 1958-02-12 | $7700.00 | Window Closed / Lapsed |