Patent US4213660A successfully refreshed from Google Patents.
Patent US2842789A successfully refreshed from Google Patents.
US2842789A
Expired / Lapsed
US
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Combined sponge and squeegee with duplex control means
Assignee: Individual
•
Filing: 1954-01-25
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Granted: 1958-07-15
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Expires: 1974-01-25
Abstract
No abstract record available.
Inventors
- 👤 Wells Bert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:08
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US559510A
Cited
US1489799A
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US1690581A
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CH137698A
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US1984370A
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US1977483A
Cited
US2008615A
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US2446401A
Cited
US2642609A
Cited
US2722701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |