US2544489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning attachment for sweeper nozzles
Assignee: Individual
•
Filing: 1948-02-26
•
Granted: 1951-03-06
•
Expires: 1968-02-26
Abstract
No abstract record available.
Inventors
- 👤 Silas F Crabb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:51
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02; A47L9/06; A47L9/0666
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US993767A
Cited
US1348585A
Cited
AU620827A
Cited
US1753799A
Cited
US1879710A
Cited
US2197641A
Cited
US2335448A
Cited
US2310554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |