Patent US2746467A successfully refreshed from Google Patents.
US2746467A
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US
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Cleaning apparatus
Assignee: DEMPSEY AND STANLEY Inc
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Filing: 1953-06-11
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Granted: 1956-05-22
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Expires: 1973-06-11
Abstract
No abstract record available.
Inventors
- 👤 Charles D Dempsey
- 👤 Kenneth E Dempsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:45
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245; C; C23; C23G; C23G3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1017100A
Cited
US1041533A
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US1262962A
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US1673594A
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US1701864A
Cited
US1826015A
Cited
US1943175A
Cited
US2702464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |