US2548923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary cleaning tool
Assignee: Individual
•
Filing: 1945-08-20
•
Granted: 1951-04-17
•
Expires: 1965-08-20
Abstract
No abstract record available.
Inventors
- 👤 Frank J Walters
- 👤 Homer B Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:05
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4041; A47L11/38; A47L11/4063; A47L11/4069; A47L11/408; A47L11/4088; Y; Y10; Y10S; Y10S29/00; Y10S29/068; Y10T; Y10T29/00; Y10T29/45; Y10T29/4528
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE383631C
Cited
US673960A
Cited
US1471748A
Cited
FR572750A
Cited
US1597644A
Cited
CH193300A
Cited
US2205249A
Cited
US2281773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |