Patent US2448328A successfully refreshed from Google Patents.
US2448328A
Expired / Lapsed
US
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Power-driven sweeping machine
Assignee: Individual
•
Filing: 1947-01-17
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Granted: 1948-08-31
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Expires: 1967-01-17
Abstract
No abstract record available.
Inventors
- 👤 Russell Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:57
CPC Classifications
E; E01; E01H; E01H1/00; E01H1/02; E01H1/04; E01H1/045
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) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |