US2497885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carpet sweeper
Assignee: Individual
•
Filing: 1940-10-04
•
Granted: 1950-02-21
•
Expires: 1960-10-04
Abstract
No abstract record available.
Inventors
- 👤 Heftler Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:03
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4072; A47L11/32; A47L11/33; A47L11/4052; A47L11/4058; A47L11/4063; A47L11/4069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US388376A
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US600413A
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US621639A
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US722642A
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US1433957A
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US1786864A
Cited
US2059907A
Cited
US2034025A
Cited
GB441175A
Cited
US2228528A
Cited
US2171633A
Cited
US2193182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |