US2554546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleansing brush for columnar evaporator and the like
Assignee: Hurd Corp
•
Filing: 1946-05-24
•
Granted: 1951-05-29
•
Expires: 1966-05-24
Abstract
No abstract record available.
Inventors
- 👤 George G Zahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:41
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D1/223; B01D1/227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US210674A
Cited
US371366A
Cited
US1009170A
Cited
US1243579A
Cited
GB211640A
Cited
US1539718A
Cited
US1795098A
Cited
US1909586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |