US2575353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for troweling or coating the interior surface of a conduit
Assignee: Individual
•
Filing: 1947-08-07
•
Granted: 1951-11-20
•
Expires: 1967-08-07
Abstract
No abstract record available.
Inventors
- 👤 Warren J Macevoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:33
CPC Classifications
B; B28; B28B; B28B19/00; B28B19/0023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1932063A
Cited
US1988329A
Cited
US2261928A
Cited
US2200871A
Cited
US2297163A
Cited
US2399321A
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 |