Patent US1852404A successfully refreshed from Google Patents.
US2394271A
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Suction cleaning apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1944-05-01
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Granted: 1946-02-05
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Expires: 1964-05-01
Abstract
No abstract record available.
Inventors
- 👤 Charles H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:44
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2889; A47L9/2836; A47L9/2842; A47L9/2857; A47L9/2868
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) | 1949-02-04 | 1949-08-06 | 1950-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-02-04 | 1953-08-06 | 1954-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-02-04 | 1957-08-06 | 1958-02-05 | $7700.00 | Window Closed / Lapsed |