US1547440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube-cleaning system
Assignee: WARREN C DRAKE
•
Filing: 1921-03-28
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Granted: 1925-07-28
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Expires: 1941-03-28
Abstract
No abstract record available.
Inventors
- 👤 Penn Marion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:29
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0553; F; F28; F28G; F28G1/00; F28G1/12; F41; F41B; F41B11/00; F41B11/80; F41B11/87; F16; F16L; F16L2101/00; F16L2101/10; F16L2101/12
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) | 1928-07-27 | 1929-01-26 | 1929-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-07-27 | 1933-01-26 | 1933-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-07-27 | 1937-01-26 | 1937-07-28 | $7700.00 | Window Closed / Lapsed |